Test each of the following hypotheses by using the given information. Assume the populations are normally distributed.

a.H0:2=15Ha:2>15=0.025,n=16,s2=34

b.H0:2=8.3Ha:28.3=0.05,n=23,s2=19

c.H0:2=45Ha:2<45=0.05,n=9,s=4.19

d.H0:2=6Ha:26=0.05,n=11,s2=1.2

Appendix A Statistical Tables

(Round your answer to 2 decimal places, e.g. 15.25.)

a.The value of the test statistic is____________________ (enter the value of test statistic rounded to 2 decimal places)and we(select a decision)

fail to reject the null hypothesis OR reject the null hypothesis.

b.The value of the test statistic is______________________ (enter the value of test statistic rounded to 2 decimal places) and we(select a decision)

reject the null hypothesis OR fail to reject the null hypothesis.

c.The value of the test statistic is_______________________ (enter the value of test statistic rounded to 2 decimal places)and we(select a decision)

reject the null hypothesis OR fail to reject the null hypothesis.

d.The value of the test statistic is________________________ (enter the value of test statistic rounded to 2 decimal places)and we(select a decision)

fail to reject the null hypothesis OR reject the null hypothesis.