Worksheet: Confidence Intervals for Population Means
In this worksheet, we will practice calculating 90%, 95%, and 99% confidence intervals for the population means.
The number of hours students spend on homework each week is known to be distributed with a standard deviation of 3.21 hours. A sample of 50 students were asked how many hours they spend doing homework in a week and the results are given in the table.
|Number of Students||4||5||8||10||4||7||9||2||1|
Find the sample mean.
Calculate a confidence interval for the population mean.