A digital camcorder repair service has set a goal not to exceed an average of 5 working days from the time the unit is brought in to the time repairs are completed. A random sample of 12 repair records showed the following repair times (in days): 5, 6, 4, 7, 4, 7, 7, 8, 6, 7, 7, 6.

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(a) H0: 5 days versus H1: > 5 days. At = .05, choose the right option.

Reject H0 if tcalc > 1.7960

Reject H0 if tcalc < 1.7960

multiple choice 1

a

b

(b) Calculate the test statistic. (Round your answer to 3 decimal places.)

Test statistic

(c-1) The null hypothesis should be rejected.

multiple choice 2

FALSE

TRUE

(c-2) The average repair time is longer than 5 days.

multiple choice 3

FALSE

TRUE

(c-3) At = .05, is the goal being met?

multiple choice 4

No

Yes