Entries by Hannah Wangui

A researcher wishes to estimate, with 95% confidence

October 1, 2019 in /by

Question  A researcher wishes to estimate, with 95% confidence, the population proportion of adults who think the president of their country can control the price of gasoline. Her estimate must be accurate within 3% of the true proportion.a) No preliminary estimate is available. Find the minimum sample size needed.b) Find the minimum sample size needed, using a prior […]

 

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In a survey of 9000 women, 6431 say they change their nail polish once a week.

October 1, 2019 in /by

Question  In a survey of 9000 women, 6431 say they change their nail polish once a week. Construct a 99% confidence interval for the population proportion of women who change their nail polish once a week.   Looking for a Similar Assignment? Order now and Get 10% Discount! Use Coupon Code “Newclient”

 

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In a survey of 2945 adults, 1473 say they have started paying bills online in the last year

October 1, 2019 in /by

Question In a survey of 2945 adults, 1473 say they have started paying bills online in the last year.Construct a 99% confidence interval for the population proportion. Interpret the results   Looking for a Similar Assignment? Order now and Get 10% Discount! Use Coupon Code “Newclient”

 

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confidence interval

October 1, 2019 in /by

Question  Construct the indicated confidence interval for the population mean μ using the t-distribution. c=.90 x overbar =14.5s=4.0 n=8 The 90% confidence interval using a t-distribution is   Looking for a Similar Assignment? Order now and Get 10% Discount! Use Coupon Code “Newclient”

 

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