Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

1) A psychologist is interested in knowing whether adults who were bullied as children differ from the general population in terms of their empathy for others. On a problemnaire designed to measure empathy, the mean score for the general population is 30.6. Random sampling of 70 scores obtained from individuals who were bullied yielded a mean of 39.5 and a standard deviation of 6.6. (Use these numbers only for this problem!)

Test at the .05 level of significance.

Summarize the data into the appropriate test statistic.

What are the degrees of freedom? (numeric value only)

2) A psychologist is interested in knowing whether adults who were bullied as children differ from the general population in terms of their empathy for others. On a problemnaire designed to measure empathy, the mean score for the general population is 39.14. Random sampling of 86 scores obtained from individuals who were bullied yielded a mean of 31.7 and a standard deviation of 10.13. (Use these numbers only for this problem!)

Test at the .05 level of significance.

Summarize the data into the appropriate test statistic.

What is the z-value or t-value you obtained (your test statistic)?  (numeric value only, including negative sign if required)

3) A psychologist is interested in knowing whether adults who were bullied as children differ from the general population in terms of their empathy for others. On a problemnaire designed to measure empathy, the mean score for the general population is 30.6. Random sampling of 25 scores obtained from individuals who were bullied yielded a mean of 39.5 and a standard deviation of 6.6.

Test at the .05 level of significance.The value of your find outd (obtained) test statistic is 6.74. What is your decision?

• reject the null hypothesis

• fail to reject the null hypothesis

• reject the alternative hypothesis

4) A psychologist is interested in knowing whether adults who were bullied as children differ from the general population in terms of their empathy for others. On a problemnaire designed to measure empathy, the mean score for the general population is 30.6. Random sampling of 25 scores obtained from individuals who were bullied yielded a mean of 39.5 and a standard deviation of 6.6.

Test at the .05 level of significance.

The best conclusion for this ex (based on your answer to Q3) would be

• Being bullied does not significantly increase the amount of empathy expressed by individuals who were bullied when compared to the general population.

• Being bullied does not significantly decrease the amount of empathy expressed by individuals who were bullied when compared to the general population.

• There is no statistical difference in the amount of empathy expressed by individuals who were bullied when compared to the general population.

• There is a statistical difference in the amount of empathy expressed by individuals who were bullied when compared to the general population.

5) A psychologist is interested in knowing whether adults who were bullied as children differ from the general population in terms of their empathy for others. On a problemnaire designed to measure empathy, the mean score for the general population is 30.6. Random sampling of 25 scores obtained from individuals who were bullied yielded a mean of 39.5 and a standard deviation of 6.6.

Test at the .05 level of significance. Based on your evaluation of the null in Q3 and your conclusion is Q4, as a researcher you would be more concerned with a

• Type I statistical error

• Type II statistical error

6) A psychologist is interested in knowing whether adults who were bullied as children differ from the general population in terms of their empathy for others. On a problemnaire designed to measure empathy, the mean score for the general population is 64.31. Random sampling of 76 scores obtained from individuals who were bullied yielded a mean of 73.93 and a standard deviation of 22.87. (Use these numbers only for this problem!)

find out the 99% confidence interval.

The mean you will use for this calculation is

7) A psychologist is interested in knowing whether adults who were bullied as children differ from the general population in terms of their empathy for others. On a problemnaire designed to measure empathy, the mean score for the general population is 30.6. Random sampling of 25 scores obtained from individuals who were bullied yielded a mean of 39.5 and a standard deviation of 6.6.

find out the 99% confidence interval.

What is the new critical value you will use for this calculation?

• ±1.645

• ±2.064

• ±2.756

• ±2.797

• 6.74

8) A psychologist is interested in knowing whether adults who were bullied as children differ from the general population in terms of their empathy for others. On a problemnaire designed to measure empathy, the mean score for the general population is 51.22. Random sampling of 25 scores obtained from individuals who were bullied yielded a mean of 35.91 and a standard deviation of 12.58. (Use these numbers only for this problem!)

find out the 99% confidence interval.

As you know, two values will be required to complete the following equation:

_________ ≤ µ ≤ __________

For this problem, what is the value that is below or less than µ?

9) A psychologist is interested in knowing whether adults who were bullied as children differ from the general population in terms of their empathy for others. On a problemnaire designed to measure empathy, the mean score for the general population is 68.71. Random sampling of 25 scores obtained from individuals who were bullied yielded a mean of 32.76 and a standard deviation of 6.11. (Use these numbers only for this problem!)

find out the 99% confidence interval.

As you know, two values will be required to complete the following equation:

_________ ≤ µ ≤ __________

For this problem, what is the value that is above or greater than µ?

10) If α = 0.16, and β = 0.22, complete the following problems by inserting the appropriate probability of each. (Response must be in decimal form) (Use these values for this problem only)

The statistical decision is to reject the null, and H0 is really true (i.e., a Type I error)

11) If α = 0.16, and β = 0.08, complete the following problems by inserting the appropriate probability of each. (Response must be in decimal form) (Use these values for this problem only)

The statistical decision is to fail to reject null, and H0 is really true (i.e., a correct decision)

12) If α = 0.13, and β = 0.15, complete the following problems by inserting the appropriate probability of each. (Response must be in decimal form) (Use these values for this problem only)

The statistical decision is to reject the null, and H0 is really false (i.e., Power)

13) If α = 0.13, and β = 0.08, complete the following problems by inserting the appropriate probability of each. (Response must be in decimal form) (Use these values for this problem only)

The statistical decision is to fail to reject the null, and H0 is really false (i.e., a Type II error)

14) A health care professional wants to determine whether individuals with hypertension who take Atenolol have significantly lower systolic blood pressure than individuals with hypertension who do not take Atenolol. For individuals who have not been prescribed Atenolol, the population systolic blood pressure mean is 165 (µ = 165). The 30 individuals who take Atenolol have an average systolic blood pressure of 147, with a sample standard deviation of 6. On the basis of these data, can the researcher conclude that the Atenolol significantly lowers systolic blood pressure? Set alpha equal to .01.

Set up the criteria for making a decision. That is, find the critical value using an alpha = .01.  (Make sure you are sign specific: + ; - ; or +/-) (Use your tables)

• +/- 2.457

• - 2.462

• - 2.750

• +/- 2.756

15) A health care professional wants to determine whether individuals with hypertension who take Atenolol have significantly lower systolic blood pressure than individuals with hypertension who do not take Atenolol. For individuals who have not been prescribed Atenolol, the population systolic blood pressure mean is 165 (µ = 165). The 43 individuals who take Atenolol have an average systolic blood pressure of 147, with a sample standard deviation of 15.35. On the basis of these data, can the researcher conclude that the Atenolol significantly lowers systolic blood pressure?  (Use these numbers only for this problem!)

What is the numeric value of your standard error?

16) A health care professional wants to determine whether individuals with hypertension who take Atenolol have significantly lower systolic blood pressure than individuals with hypertension who do not take Atenolol. For individuals who have not been prescribed Atenolol, the population systolic blood pressure mean is 140 (µ = 140). The 167 individuals who take Atenolol have an average systolic blood pressure of 151, with a sample standard deviation of 6. On the basis of these data, can the researcher conclude that the Atenolol significantly lowers systolic blood pressure?  (Use these numbers only for this problem!)

What is the z-value or t-value you obtained (your test statistic)?  (numeric value only, including negative sign if required)

17) A health care professional wants to determine whether individuals with hypertension who take Atenolol have significantly lower systolic blood pressure than individuals with hypertension who do not take Atenolol. For individuals who have not been prescribed Atenolol, the population systolic blood pressure mean is 165 (µ = 165). The 30 individuals who take Atenolol have an average systolic blood pressure of 147, with a sample standard deviation of 6. On the basis of these data, can the researcher conclude that the Atenolol significantly lowers systolic blood pressure? Set alpha equal to .01.

The value of your find outd (obtained) test statistic is -16.51. What is your decision?

• Reject the null hypothesis

• Fail to reject the null hypothesis

18) A health care professional wants to determine whether individuals with hypertension who take Atenolol have significantly lower systolic blood pressure than individuals with hypertension who do not take Atenolol. For individuals who have not been prescribed Atenolol, the population systolic blood pressure mean is 165 (µ = 165). The 30 individuals who take Atenolol have an average systolic blood pressure of 147, with a sample standard deviation of 6. On the basis of these data, can the researcher conclude that the Atenolol significantly lowers systolic blood pressure? Set alpha equal to .01.

The best conclusion for this ex (based on your answer to Q17) would be:

• There is no significant difference in systolic blood pressure when comparing people who take Atenolol to the general population of people who do not take Atenolol.

• There is a significant difference in systolic blood pressure when comparing people who take Atenolol to the general population of people who do not take Atenolol.

• People taking Atenolol did not experience a significantly lower systolic blood pressure when compared to the general population of people who do not take Atenolol.

• People taking Atenolol experienced a significantly lower systolic blood pressure when compared to the general population of people who do not take Atenolol.

19)  A health care professional wants to determine whether individuals with hypertension who take Atenolol have significantly lower systolic blood pressure than individuals with hypertension who do not take Atenolol. For individuals who have not been prescribed Atenolol, the population systolic blood pressure mean is 165 (µ = 165). The 30 individuals who take Atenolol have an average systolic blood pressure of 147, with a sample standard deviation of 6. On the basis of these data, can the researcher conclude that the Atenolol significantly lowers systolic blood pressure? Set alpha equal to .01.

Based on whether you rejected or failed to reject the null hypothesis (Q17), and your conclusion in Q18, as a researcher, you would be more concerned with a:

• Type I statistical error

• Type II statistical error

20) A health care professional wants to determine whether individuals with hypertension who take Atenolol have significantly lower systolic blood pressure than individuals with hypertension who do not take Atenolol. For individuals who have not been prescribed Atenolol, the population systolic blood pressure mean is 165 (µ = 165). The 30 individuals who take Atenolol have an average systolic blood pressure of 118, with a sample standard deviation of 6. On the basis of these data, can the researcher conclude that the Atenolol significantly lowers systolic blood pressure? (Use these data for this problem only!)

find out the 95% confidence interval.

The mean you will use for this calculation is:

21) A health care professional wants to determine whether individuals with hypertension who take Atenolol have significantly lower systolic blood pressure than individuals with hypertension who do not take Atenolol. For individuals who have not been prescribed Atenolol, the population systolic blood pressure mean is 165 (µ = 165). The 30 individuals who take Atenolol have an average systolic blood pressure of 147, with a sample standard deviation of 6. On the basis of these data, can the researcher conclude that the Atenolol significantly lowers systolic blood pressure?

find out the 95% confidence interval.

What is the new critical value you will use for this calculation?

• +/- 1.699
• +/- 2.045
• +/- 2.457
• +/- 2.462
• - 2.045

22)  A health care professional wants to determine whether individuals with hypertension who take Atenolol have significantly lower systolic blood pressure than individuals with hypertension who do not take Atenolol. For individuals who have not been prescribed Atenolol, the population systolic blood pressure mean is 167 (µ = 167). The 30 individuals who take Atenolol have an average systolic blood pressure of 150, with a sample standard deviation of 25. On the basis of these data, can the researcher conclude that the Atenolol significantly lowers systolic blood pressure? (Use these numbers only for this problem!)

find out the 95% confidence interval.

As you know, two values will be required to complete the following equation:

_________ ≤ µ ≤ __________

For this problem, what is the value that is below or less than µ?

23)  A health care professional wants to determine whether individuals with hypertension who take Atenolol have significantly lower systolic blood pressure than individuals with hypertension who do not take Atenolol. For individuals who have not been prescribed Atenolol, the population systolic blood pressure mean is 174 (µ = 174). The 30 individuals who take Atenolol have an average systolic blood pressure of 164, with a sample standard deviation of 26. On the basis of these data, can the researcher conclude that the Atenolol significantly lowers systolic blood pressure? (Use these numbers only for this problem!)

find out the 95% confidence interval.

As you know, two values will be required to complete the following equation:

_________ ≤ µ ≤ __________

For this problem, what is the value that is above or greater than µ?

24) The average time scheduled for a doctor’s visit is 17 minutes with a standard deviation of 20 minutes. A researcher uses a sampling distribution made up of samples of size 319. (Use these numbers for this problem only!)

According to the Central Limit Theorem, what is the standard error of the mean?

25) The average time scheduled for a doctor’s visit is 22 minutes with a standard deviation of 15 minutes. A researcher uses a sampling distribution made up of samples of size 318. (Use these numbers for this problem only!)

According to the Central Limit Theorem, what is the mean of the sampling distribution of means?

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M91683

Have any Question? 


Related Questions in Statistics and Probability

Assignmentthe production department of the newspaper wants

Assignment The production department of the newspaper wants to ensure that the mean blackness of the print for all newspapers is at least 0.97 on a standard scale in which the target value is 1.0. A random sample of 50 n ...

1 in an experiment with two independent variables an anova

1. In an experiment with two independent variables, an ANOVA partitions the total variance into four components. What are they? 2. MS wg  appears in the denominator of every F-test. Why?

1 what is the difference between a stratum and a cluster2

1. What is the difference between a stratum and a cluster? 2. What is the drawback of obtaining random samples by telephone? 3. In what way would the use of sampling improve the accuracy of the United States census?

A research concludes that the number of hours of exercise

A research concludes that the number of hours of exercise per week for adults is normally distributed with a mean of 3.5 hours and a standard deviation of 3 hours. Show all work. Just the answer, without supporting work, ...

Suppose there are three bills in a wallet one of the bills

Suppose there are three bills in a wallet. One of the bills is a $1 bill, one is a $5 bill, and the third is a $10 bill. You select two bills at random without replacement from the wallet, and note the value of the bills ...

1 what aspects of data analysis can be performed by

1. What aspects of data analysis can be performed by computers, and what are the advantages of using them to do so? 2. Review the procedures used to verify that collected data are coded and entered correctly before they ...

During a certain week the mean price of gas was 2709 per

During a certain week the mean price of gas was $2.709 per gallon. A random sample of 35 gas stations is drawn from this population. What is the probability that the mean price for the sample was $2.697 and $2.716 that w ...

A recent report suggested that older people think more

A recent report suggested that older people think more slowly than younger people because they have more information stored in their brains.  Because WeStudyEverything wasn't sure regarding the source of the study, they ...

Question 1 -happy harrys hamburgers recently commissioned a

Question 1 - Happy Harry's Hamburgers recently commissioned a top tier consulting company to develop a new location selection process. However, after receiving the first invoice from the consulting company, Happy Harry w ...

Afire with faith 1820-18501 how did revivalism help people

Afire with Faith, 1820-1850} 1. How did revivalism help people adjust to the market? 2. Describe the range of antislavery positions, and mention at least three people who exemplified those different positions? 3. How did ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro