TABLE 10-7 To Investigate the Efficacy of a Diet, a Random Sample

question 146

Short Answer

TABLE 10-7
To investigate the efficacy of a diet, a random sample of 16 male patients is drawn 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 10-7, the t test should be ________-tail.

---

Definitions:

East Segment

A division or geographical area of a business focused on the eastern region, often used in reporting or segmenting operations.

Segment Margin

The profit generated by a particular segment of a business, after deducting direct and allocated expenses specific to the segment.

Segmented Income Statement

A financial statement that breaks down revenues, costs, and profits for different parts of an organization, such as departments or product lines.

Contribution Format

An income statement format that separates variable costs from fixed costs, highlighting the contribution margin of sales over variable costs.