Betropolis conducts an advertising campaign to get people to lose weight. A random sample of 49 people results in an average loss of 1.5 pounds 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?

1.a. Test (2-tailed) the (alternative) hypothesis at a confidence level of 95%.

Estimate of population mean: ___< <___. Reject or accept H0? ___

1.b. Test the hypothesis at a confidence level of 60%

Estimate of population mean: ___< <___. Reject or accept H0? ___

Final answers should be correct to 3 places after the decimal point.