10. Assembling Electronic Equipment An experiment was conducted to compare the effectiveness of three training programs, A, B, and C, for assemblers of a piece of electronic equipment. Five employees were randomly assigned to each of three programs. After completion of the program, each person assembled four pieces of the equipment, and their average assembly time was recorded. Several employees resigned during the course of the program; the remainder were evaluated, producing the data shown in the accompanying table. Use the Excel printout to answer the questions in parts a–d

a. Do the data indicate a significant difference in mean assembly times for people trained by the three programs?
Give the p-value for the test and interpret its value.

b. Find a 99% confidence interval for the difference in mean assembly times between persons trained by programs A and B.

c. Find a 99% confidence interval for the mean assembly times for persons trained by program A.

d. Do you think the data will satisfy (approximately)
the assumption that they have been selected from normal populations? Why?

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Training Program Average Assembly Time (min) ABC 59 64 57 62 52 58 54 58 65 71 63 64