To assess the effectiveness of a new workplace safety awareness program, five employees at Potemkin Realty were randomly chosen. Before they participate in the awareness program, the five workers are given a test consisting of 100 safety related questions. After participating in the program, the same five workers are tested again. The table below shows before and after test results. Treating each worker as a matched pair of subjects, and assuming that the necessary population conditions are satisfied, build a 95% confidence interval estimate of the average difference in test scores for the populations represented.
Answer to relevant QuestionsFive supermarket checkers were randomly selected to test two different checkout procedures. The order in which the procedures were assigned to each checker was random. The number of items checked in a half hour period was ...Refer to Exercise 52. a. Show the bar chart for the sampling distribution and comment on its shape. b. Show that the mean of the sampling distribution is exactly equal to the population proportion, . c. Show that the ...It has been reported that 25% of the homes in the Minneapolis, Minnesota area have been fully weatherized within the past 10 years. You plan to take a random sample of 100 area homes and will compute the proportion of homes ...The administration wants to estimate the proportion of students at Pitcairn College (enrollment: 12,000) who favor a change in the pass/ fail grading system. A random sample of 200 students is selected without replacement. ...UltraProduct is testing two alternative order processing systems. System 1 processes orders on essentially a “first come, first served” basis. System 2 uses a more sophisticated simulation based technique. Using a sample ...
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