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): 7, 6, 9, 7, 5, 4, 3, 5, 6, 5, 7, 6.

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(a)H₀: 5 days versusH₁:> 5 days. At = .05, choose the right option.

1. RejectH₀ift_calc> 1.7960
2. RejectH₀ift_calc< 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.

FALSE

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

FALSE

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

No