WeBWorK Standalone Renderer

Statistics calculated from a sample of observations are:

$\sum_{i=1}^{}x_{i} =$

$\sum_{i=1}^{}x^2_{i} =$

Provide the following, rounding your answers to two decimal places.

(a) Find the sample mean.

(b) What is the sample standard deviation?

(c) Assume that the population distribution is normal. Find a 95% confidence interval for the population mean. ( , )

You can earn partial credit on this problem.