A copy machine service company provides maintenance and repair service for different types and brands of copiers. The manager of the repair department wants to know if the repair time for brand A is higher than the repair time for brand B. The manager randomly selected eight repair records associated with brand A and eight repair records associated with brand B. The repair times (in minutes) for both samples are given below. The distribution of repair times for both brand A and brand B is highly skewed. On average, can it be concluded that the repair time for brand A is significantly higher than the repair time for brand B? Test at α = .05.
A) Reject the null hypothesis.
B) Fail to reject the null hypothesis.

Question

A copy machine service company provides maintenance and repair service for different types and brands of copiers. The manager of the repair department wants to know if the repair time for brand A is higher than the repair time for brand B. The manager randomly selected eight repair records associated with brand A and eight repair records associated with brand B. The repair times (in minutes) for both samples are given below. The distribution of repair times for both brand A and brand B is highly skewed.  On average, can it be concluded that the repair time for brand A is significantly higher than the repair time for brand B? Test at α = .05.
A) Reject the null hypothesis. 
B) Fail to reject the null hypothesis.

Quizplus · Accepted Answer

H₀: μ_DA≤ μ_DB H_A: D_A is shifted to the right of D_B, or H_A: μ_DA> μ_DB 11ead627_0a01_f3e4_93a1_5d592d7ad6fe_TB7056_00 T = 89.5 From table A15 for n₁ = 8, and n₂= 8, T_U = 84 Because 89.5 > 84, we reject H₀ and conclude that the repair times for brand A are higher than the repair times for brand B.

A Copy Machine Service Company Provides Maintenance and Repair Service