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Clark Heter is an industrial engineer at Lyons Products. He would like to determine whether there...

Clark Heter is an industrial engineer at Lyons Products. He would like to determine whether there are more units produced on the night shift than on the day shift. The mean number of units produced by a sample of 59 day-shift workers was 323. The mean number of units produced by a sample of 67 night-shift workers was 333. Assume the population standard deviation of the number of units produced on the day shift is 19 and 27 on the night shift.

At the 0.10 significance level, is the number of units produced on the night shift larger?

  1. Is this a one-tailed or a two-tailed test?

  • One-tailed test

  • Two-tailed test

  1. State the decision rule. (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.)

  1. Compute the value of the test statistic. (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.)

  1. What is your decision regarding H0?

  • Do not reject H0.

  • Reject H0.

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