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A digital camcorder repair service has set the goal not to exceed the average of 5 working days from the time the unit is brought in to time repairs are completed. A random sample of 12 repair records showed following repair times (in days): 9, 2, 5, 1, 5, 4, 7, 5, 11, 3, 7, 2.

(a) H0: μ≤ 5 days versus H1: μ> 5 days. Select the right option.

Reject H0 if t < 1.796

Reject H0 if t >1.796

(b) Compute the t-value.

True

False

(c) The null hypothesis must be rejected.

True

False

(d) The average repair time is longer than 5 days

True

False

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M922687

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