1. Given a sample mean (xbar) of 150 and a population standard deviation sigma () of 5.5 from a previous study where n= 25 values, find the z value and p value. The data indicated that the population mean for the average weight of a fully-grown, male St. Bernard is 160 pounds, but I think it may be lower based on new data. Test the claim that the mean<160.

Reminder: alpha is 0.05

2.

Decision Making chart
	Do Not Reject Ho	Reject Ho
Ho True	Correct Decision	Type I error Probability = Alpha
Ho False	Type II Error Probability = Beta	Correct Decision

Given a sample mean (xbar) of 65 and apopulation standard deviationsigma of 3 from a previous study where n=30 values, find the z value and p value. The dateindicates that the population mean for thesport bikeis 45 miles per gallon, but we think it may be lower based on our data. Test the claim that u<45. Use 0.05 for your alpha.