Entries by Hannah Wangui

You are given the sample mean and the population standard deviation

October 1, 2019 in /by

Question  You are given the sample mean and the population standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean. Which interval is wider? If convenient, use technology to construct the confidence intervals. A random sample of 35 gas grills has a mean price of $636.70. Assume the population standard deviation is $58.90. […]

 

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A random sample of fifty-eight 200-meter swims has a mean time of 3.66 minutes

October 1, 2019 in /by

Question  A random sample of fifty-eight 200-meter swims has a mean time of 3.66 minutes and the population standard deviation is .08 minutes. Construct a 90% confidence interval for the population mean time. Interpret the results.   Looking for a Similar Assignment? Order now and Get 10% Discount! Use Coupon Code “Newclient”

 

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A publisher wants to estimate the mean length of time (in minutes)

October 1, 2019 in /by

Question  A publisher wants to estimate the mean length of time (in minutes) all adults spend reading newspapers. To determine this estimate, the publisher takes a random sample of 15 people and obtains the results below. From past studies, the publisher assumes σ is 2.3 minutes and that the population of times is normally distributed.   Looking for a […]

 

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Translate the excerpt below into a confidence interval

October 1, 2019 in /by

Question  Translate the excerpt below into a confidence interval for p and approximate the value of the level of confidence, c.In a survey of 8487 adults, 30.6% said they were taking vitamin E as a supplement. The survey’s margin of error is plus or minus 1%.   Looking for a Similar Assignment? Order now and Get 10% Discount! […]

 

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