Testing: H0:50.3 H1:<50.3 Your sample consists of 23 values, with a sample mean of 49. Suppose the population standard deviation is known to be 3.82. a) Calculate the value of the test statistic, rounded to 2 decimal places. z= b) At =0.08=0.08, the rejection region is

• z>1.75
• z<-1.41 or z>1.41
• z<-1.75 or z>1.75
• z<-1.75
• z<-1.41
• z>1.41

c) The decision is to

• Fail to reject the null hypothesis
• Reject the null hypothesis
• Accept the alternative hypotheis
• Accept the null hypothesis

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

• Type II
• Type I