Suppose that you are testing the hypotheses H0: P=.20 vs HA P is NOT equal to .20 . A sample of size 300 results in a sample proportion of 0.26. a) construct a 90% confidence interval for p. b) based on the confidence interval, can you reject HO at alpha = .10? Explain. c) What is the difference between the standard error and standard deviation of the sample proportion? d)which is used in computing the confidence interval? Please help me solve all these problems A-C correctly. Thank you