A sample of 9 technicians exposed to the standard version of a
training film
required an average of
31.4 minutes to minutes to service a
composer system, with a standard derivation of 14.5 minutes. For 7
techicians viewing an alternative version of the film, the average
time required was 22.3 minutes, with a standard derivation of 10.2
minutes.

Data

Standard
Alternative A. What are the null and alternative hypothesis
to
test if the variance in sound levels has changed

b. using alpha is .05, what are the critical values?

C. What’s the
test Statistic for the hypothesis test?

D. Draw a conclusion for the hypothesis test.

E. What is the p-value for the hypothesis test?

                     Data

   Standard         Alternative

13.59                      32.22

23.48                      21.89

23.18                    31.32

18.69                     10.70

39.96                    16.73

59.12                     17.22  

57.17                    43.36

60.77                    43.04