H0:=54.8 H1:54.8 Your sample consists of 40 values, with a sample mean of 54.6. Suppose the population standard deviation is known to be 1.55.

a) Calculate the value of the test statistic, rounded to 2 decimal places.

b) At =0.025=0.025, the rejection region is

c) The decision is to

d) Suppose you mistakenly failed to reject the null hypothesis in this problem, what type of error is that?

Please answer A-D