• A significance test is going to be performed using a significance level of=0.05equals. Suppose that the null hypothesis is actually true.If the significance level was lowered to 0.01,which of the following is true?

A.The probability of a Type I Error would increase

B.The probability of a Type I Error would decrease.

C.The probability of a Type I Error would stay the same.

D.We don't have enough information to determine the change in the probability of a Type I Error.

• A manufacturer makes chocolate squares that have a target weight of 8 g.Quality control engineers sample 30 chocolate squares to see whether H0: = 8 vs. Ha: 8 where is the true average weight of the chocolate squares.They calculate the sample mean of the 30 squares to be 8.3 g.Suppose the population standard deviation is 0.87 g and the true weight is 8.5 g.At the 5% level of significance, calculate the power for the test.For full credit, include all steps as described in class.

please help, i miss one of my lecture and i have no idea what formula should i use for those two question, add explanation too please !