Answered>Order 2260

1. The ages of seniors at Betropolis University are  notNormally distributed. A random sample of 24 students has a sample mean of 21 and a sample standard deviation of 2.3 years. Estimate the population mean for a 95% confidence level. Your final answers should be correct to 2 places after the decimal point.

The estimate of population mean: __________< u < ____________

You must use the T – distribution.

 Betropolis conducts an advertising campaign to get people to lose weight. A random sample of 49 people results in an average loss of 1 pound with a sample standard deviation of 7 pounds. Can we infer that the campaign had an effect (good or bad) as opposed to no effect?