Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

Multiple choice problems based on the test of single population mean.

1. Assume that in a hypothesis test with null hypothesis 0 μ H : = 13.0 at a = 0.05, that a value of 11.0 for the sample mean results in the null hypothesis not being rejected. That corresponds to a confidence interval result of
i. The 95% confidence interval for the mean does not contain the value 13.0
ii. The 95% confidence interval for the mean contains the value 11.0
iii. There is insufficient information to conclude whether the 95% confidence interval for the mean contains or does not contain the value 13.0
iv. The 95% confidence interval for the mean contains the value 13.0

2. Nationwide, the average waiting time until electric utility customer service representative answers a call is 300 seconds per call. The Gigantic Kilowatt Energy Company took a sample of 35 calls and found that, on the average, they answered in 240 seconds per call with the standard deviation of 50. Can the company claim that they are faster than the average utility?
a. No, because -0.20 falls in the critical region
b. Yes, because -7.10 falls in the critical region
c. No, because -1.20 falls in the critical region
d. Yes, because -0.20 falls in the critical region

3. If the observed value is 4, the expected value is 5, and the standard error is 4, then the test value used for the z test is equal to
a.-1.00
b.0.25
c.-0.25
d.1.00

4. Using the z table in Table E of Appendix C, what are the critical values for a two-tailed test while a = 0.03.
a.± 2.17
b.± 2.05
c.± 2.33
d. ± 1.88

5. The average speed of greyhound dogs is about 18.8 meters per second. A particular greyhound breeder claims that her dogs are faster than the average greyhound. In a sample of 45 of her dogs, they ran, on the average, 19.2 meters per second with a standard deviation of 1.4. Is her claim accurate if she is willing to accept an error rate of 2.5 out of 100?
a. Yes, because 1.92 falls in the noncritical region
b. No, because 0.04 falls in the noncritical region
c. Yes, because 0.04 falls in the noncritical region
d. No, because 1.92 falls in the noncritical region

6. What is the critical t-value for a right-tailed test when a = .025and d.f. = 12?
i.0.695
ii.2.179
iii.2.831
iv.2.201

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M921979

Have any Question? 


Related Questions in Statistics and Probability

Risk taking is an important part of investing in order to

Risk taking is an important part of investing. In order to make suitable investment decisions on behalf of their customers, portfolio managers give a questionnaire to new customers to measure their desire to take financi ...

Suppose that you wanted to study children who have down

Suppose that you wanted to study children who have Down syndrome. How might you use cluster sampling to obtain a probability sample of children with Down syndrome in your state?

Applicationcomparing software development

Application Comparing Software Development Workloads Estimating the cost of developing software in terms of work load is difficult since it is a challenge to quantify the size and complexity of a software system. The art ...

Problem 1 three times each day a quality engineer samples a

Problem 1: Three times each day, a quality engineer samples a component from a recently manufactured batch and tests it. Each part is classified as conforming (suitable for its intended use), downgraded (unsuitable for t ...

What are the key components of consideration that went into

What are the key components of consideration that went into forming the Texas Constitution?

Mrjassica manager of appliances for midtown department

Mr.jassica, Manager of appliances for midtown department store feels that her inventory levels of stoves have been running higher than necessary. Before revising the inventory policy for stoves she records the number sol ...

One of the behavioral research case studies involved agocha

One of the Behavioral Research Case Studies involved Agocha and Cooper's (1999) study of partner characteristics and intentions to practice safe sex. Below are the Pearson correlations between the likelihood that partici ...

1 why do researchers want the error variance in their data

1. Why do researchers want the error variance in their data to be small? 2. Why do researchers use meta-analysis?

What was polks plan for the conduct of the war what were

What was Polk's plan for the conduct of the war? What were the objectives of the American offensives in the war? How did Generals Zachary Taylor and Winfield Scott approach the problem of fighting the Mexican Army over s ...

Thirteen students were randomly selected from the college

Thirteen students were randomly selected from the College of Public Health and their diastolic blood pressure was tested. The sample mean and standard deviation were 80.9 mmHg and 2.1 mmHg respectively. What is the obtai ...

  • 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