Ho: U = 57.2 H1: 14 / 57.2 Your sample consists of 34 values, with a sample mean of 56.7. Suppose the population standard deviation is known to be 1.7. a) Calculate the value of the test statistic, rounded to 2 decimal places. Z b) At a = 0.025, the rejection region is Oz 1.96 Oz > 2.24 Oz 2.24 Oz 1.96 c) The decision is to O Fail to reject the null hypothesis O Reject the null hypothesis O Accept the null hypothesis O Accept the alternative hypotheis d) Suppose you mistakenly failed to reject the null hypothesis in this problem, what type of error is that? O Type I Type