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  3. 1. out of 200 people sampled, 92 had kids. based o

1. Out of 200 people sampled, 92 had kids. Based on this, construct a 99% confidence...

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Statistics

1. Out of 200 people sampled, 92 had kids. Based on this,construct a 99% confidence interval for the true populationproportion of people with kids.

Give your answers as decimals, to four places

2.

A fitness center is interested in finding a 98% confidenceinterval for the mean number of days per week that Americans whoare members of a fitness club go to their fitness center. Recordsof 261 members were looked at and their mean number of visits perweek was 3.5 and the standard deviation was 1.7. Round answers to 3decimal places where possible.

a. To compute the confidence interval use a ? zt  distribution.

b. With 98% confidence the population mean number of visits perweek is between  and   visits.

c. If many groups of 261 randomly selected members are studied,then a different confidence interval would be produced from eachgroup. About  percent of these confidence intervals willcontain the true population mean number of visits per week andabout  percent will not contain the true population meannumber of visits per week.

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