Suppose that you are testing the hypotheses Ho: H = 78 vs. HA: H #78. A sample of size 41 results in a sample mean of 73 and a sample standard deviation of 1.7. a) What is the standard error of the mean? b) What is the critical value of t* for a 90% confidence interval? c) Construct a 90% confidence interval for u. d) Based on the confidence interval, at a = 0.100 can you reject Ho? Explain