9A A personnel researcher has designed a questionnaire and she would like to estimate the average...

90.2K

Verified Solution

Question

Basic Math

9A A personnel researcher has designed a questionnaireand she would like to estimate the average time to complete thequestionnaire. Suppose she samples 100 employees and finds that themean time to take the test is 27 minutes with a standard deviationof 4 minutes. Construct a 90% confidence interval for the mean timeto complete the questionnaire. Also, write a short explanationabout the findings to the human resources director of your companysummarizing the results. – Use Excel for thisanalysis.
9B. For the problem in part A, the human resourcesdirector wants to know whether these is sufficient sample evidenceto conclude that the average time to complete the questionnaire isnot 27 minutes. Set up the hypotheses (in statistical terms) and,based only on the confidence interval you have constructed in partA, what would you conclude regarding the hypotheses?
H0 :
H1 :

Answer & Explanation Solved by verified expert

4.0 Ratings (619 Votes)

Solution AGiven Sample size n 100 Sample mean x 27 minutes Sample standard deviation s 4 minutes We have to find 90 confidence interval Given confidence level 090 Therefore See Answer

Get Answers to Unlimited Questions

Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!

Membership Benefits:

Unlimited Question Access with detailed Answers
Zin AI - 3 Million Words
10 Dall-E 3 Images
20 Plot Generations
Conversation with Dialogue Memory
No Ads, Ever!
Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!

Become a Member