Testing: Ho: u 18.2 Your sample consists of 39 values, with a sample mean of 19.7. Suppose the population standard deviation is known to be 4.96. a) Calculate the value of the test statistic, rounded to 2 decimal places. Z b) At a - 0.03, the rejection region is Oz 1.88 Oz 2.17 Oz 1.88 Oz > 2.17 c) The decision is to Accept the alternative hypotheis O Fail to reject the null hypothesis O Reject the null hypothesis Accept the null hypothesis d) Suppose you mistakenly rejected the null hypothesis in this problem, what type of error is that? O Type I O Type