David Desreumaux, VP of Human Resources of Maritime Boat Manufacturing $\alpha$

question 53

Multiple Choice

David Desreumaux, VP of Human Resources of Maritime Boat Manufacturing (MBM) , is reviewing the employee training programs of MBM factories.Based on a recent census of personnel, David knows that the variance of worker training time in New Brunswick is 8, and he wonders if the variance in Nova Scotia is the same number.His staff randomly selected personnel files for 15 workers in Nova Scotia, and determined that their mean training time was 25 hours and that the standard deviation was 4 hours.Assume that worker training time is normally distributed in the population.Using $\alpha$ = 0.10, the critical values of chi-square are ___.

• A)7.96 and 26.30
• B)6.57 and 23.68
• C)-1.96 and 1.96
• D)-1.645 and 1.645
• E)-6.57 and 23.68

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