Entries by Grace Wahito

21 ​people, the mean commute time to work was 34.7 minutes and the standard deviation was 7.1 minutes

March 7, 2020 in /by

In a random sample of  style=”color:rgb(0,0,0);”>21 ​people, the mean commute time to work was 34.7 minutes and the standard deviation was 7.1 minutes. Assume the population is normally distributed and use a​ t-distribution to construct a 99​% confidence interval for the population mean μ. What is the margin of error of μ​? Interpret the results. The […]

 

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People were polled on how many books they read the previous year

March 7, 2020 in /by

People were polled on how many books they read the previous year. How many subjects are needed to estimate the number of books read the previous year within one book with 95​% ​confidence? Initial survey results indicate that sigma σequals 17.3 books.   Looking for a Similar Assignment? Order now and Get 10% Discount! Use […]

 

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A population has a mean μ =83 and a standard deviation sigma σ =16. Find the mean and standard deviation of a sampling distribution of sample means with sample size n=64.

March 7, 2020 in /by

A population has a mean μ =83 and a standard deviation sigma σ =16. Find the mean and standard deviation of a sampling distribution of sample means with sample size n=64.   Looking for a Similar Assignment? Order now and Get 10% Discount! Use Coupon Code “Newclient”

 

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In a survey of 3965 ​adults, 715 say they have seen a ghost.Construct a​ 99% confidence interval

March 7, 2020 in /by

In a survey of 3965 ​adults, 715 say they have seen a ghost.Construct a​ 99% confidence interval for the population proportion. Interpret the results. A​ 99% confidence interval for the population proportion is : ​(Round to three decimal places as​ needed.) Interpret your results. Choose the correct answer below. A. With​ 99% confidence, it can […]

 

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