TABLE 10-6 To Investigate the Efficacy of a Diet, a Random Sample

question 121

Short Answer

TABLE 10-6
To investigate the efficacy of a diet, a random sample of 16 male patients is selected from a population of adult males using the diet. The weight of each individual in the sample is taken at the start of the diet and at a medical follow-up 4 weeks later. Assuming that the population of differences in weight before versus after the diet follow a normal distribution, the t test for related samples can be used to determine if there was a significant decrease in the mean weight during this period. Suppose the mean decrease in weights over all 16 subjects in the study is 3.0 pounds with the standard deviation of differences computed as 6.0 pounds.
-Referring to Table 10-6, a one-tail test of the null hypothesis of no difference would ________ (be rejected/not be rejected) at the α = 0.05 level of significance.

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Definitions:

Labor Rate Variance

A financial measure that compares the actual cost of labor to the expected or standard cost, indicating how well a company manages its labor expenses.

Labor Efficiency Variance

A measure of the difference between the actual hours worked by employees and the expected hours worked, multiplied by the standard labor rate.

Variable Overhead Rate Variance

The difference between the actual variable overhead incurred and the expected (or standard) costs based on the predetermined overhead rate.

Month

A unit of time, roughly based on the period of the lunar cycle, used in calendars to divide the year.