Lind2 - Shikeyas Answers Lind Ch 11#24 28 24 Clark Heter is an industrial engineer at Lyons Products He would like to determine whether there are more

# Lind2 - Shikeyas Answers Lind Ch 11#24 28 24 Clark Heter is...

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Shikeya’s Answers Lind Ch 11 #24, 28 24. Clark Heter is an industrial engineer at Lyons Products. He would like to determine whetherthere are more units produced on the afternoon shift than on the day shift. A sample of 54day-shift workers showed that the mean number of units produced was 345, with a standarddeviation of 21. A sample of 60 afternoon-shift workers showed that the mean numberof units produced was 351, with a standard deviation of 28 units. At the .05 significancelevel, is the number of units produced on the afternoon shift larger? Test Statistic 1 2 1 2 1 2 2 1 1 ( ) ~ n n X X n n t t S n n where 2 2 1 1 2 2 1 2 1 1 2 n S n S S n n Rejection Criteria : Reject the null hypothesis if the calculated value of t is less than the critical value of t Significance level : 0.05