Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

Multiple choice problems based on the confidence interval and correlation.

1) Find the linear correlation coefficient, r, between x and y. x: 0, 3, 3, 1, 4 y: 1, 7, 2, 5, 5
a)r=.333  
b)r=.749  
c)r=.974  
d)r=.497  

 

2)Express the confidence interval .600, .800 in the form p-hat plus and minus E.
a).8 plus and minus .2  
b).6 plus and minus .2  
c).6 plus and minus .3  
d).7 plus and minus .1  

 

3)Find the critical value. 99% confidence, sigma is unknown, population is normal, n=15.
a)2.977  
b)1.645  
c)1.965  
d)3.360  

 

4) Listed below are intervals (in minutes) between eruptions of the Old Faithful Geyser in Yellowstone National Park. Find the median. 98, 92, 95, 87, 96, 90, 65, 92, 95, 93, 98, 94
a)95.7  
b)100  
c)91.3  
d)93.5  

 

5) In a study of brand recognition 831 consumers knew of Campbell's soup and 18 did not. Use the results to estimate the probability that a randomly selected consumer will recognize Campbell's soup.
a).021  
b).979  
c).777  
d).999  

 

6) A test consists of multiple choice problems, each having 4 possible answers (a, b, c, d), 1 of which is correct. Assume you guess the answers to 6 such problems. Find the probability that the first 2 guesses are wrong and the last 4 guesses are correct.
1).00220  
2).10  
3).02200  
4).667  

 

7)The mean and standard deviation of a normal distribution is 100 and 15 respectively. Find the probability that a value is between 110 and 120.
a).1382  
b).1596  
c).9404  
d).2179  

 

8)Construct the confidence interval for the population proportion where n=1200, x=800, 99% confidence.
a).632, .702  
b).612, .712  
c).368, .902  
d).512, .602  

 

9)A dietician obtains the amounts of sugar from 100 centigrams in each of 10 different cereals, including Cheerios, Corn Flakes, Froot Loops, and 7 others. Those values are listed below. Find the mean. 3, 24, 30, 47, 43, 7, 47, 13, 44, 39
1)34.5  
2)47  
3)25  
4)29.7

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M922001

Have any Question? 


Related Questions in Statistics and Probability

The number of accidents occurring per week at a dangerous

The number of accidents occurring per week at a dangerous intersection, recorded over a period of 6 weeks are, 2, 1, 6, 5, 1, 3. What is the sample standard deviation for this data?

Reading journal assignment stage iifor this portion of the

Reading Journal Assignment Stage II For this portion of the journal, you will create five journal entries, each addressing the prompts given below. Each entry will be one page in length, double spaced, with 12 point font ...

Corrections for phase 4in confidence interval calculations

CORRECTIONS FOR PHASE 4 In confidence interval calculations, sqrt(364) goes in the bottom for E; this has thrown off your intervals - too narrow; t should be negative in the hypothesis test, but your conclusion is correc ...

A prospective purchaser wishes to estimate the mean dollar

A prospective purchaser wishes to estimate the mean dollar amount of sales per customer at a toy store located in an airport terminal. Based on data from other similar airports, the standard deviation of such sales is ab ...

Part 11 a polling firm conducted a poll of 1000 randomly

Part 1. 1. A polling firm conducted a poll of 1000 randomly selected Georgia Stat University students and discovered that 47% of them voted for Bush in 2004. Nationwide Bush received 51.2% of the popular vote. Using this ...

The following tables depict the preferences of three

The following tables depict the preferences of three universities regarding a set of applicants, and the preferences of the applicants regarding the universities. Every university also has a specified quota for the numbe ...

In your words demonstrate your understanding on the

In your words, demonstrate your understanding on the following concepts: a) Survival analysis b) Life table c) Kaplan-Meier curve d) Logrank test e) Negative exponential survival distribution f) Cox proportional hazards ...

A researcher was interested in whether people tend to marry

A researcher was interested in whether people tend to marry individuals who are about the same level of physical attractiveness as they are. She took individual photographs of 14 pairs of spouses. Then, she had 10 partic ...

In this course you will apply statistical analysis tools

In this course, you will apply statistical analysis tools and biomedical research methodologies to health information management processes and cases. Descriptive statistics, nonparametric methods, and inferential concept ...

Jim has weighted gpa of 384 his high school gpas are

Jim has weighted GPA of 3.84. His high school GPA's are normally distributed with a mean of 2.9 and a standard deviation of 0.5. Kim's high school uses unweighted GPA's and she has a GPA of 3.57. GPA's are also normally ...

  • 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

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

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen