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

question 97

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, there are _______degrees of freedom for this test.

---

Definitions:

Histogram

A graphical display of a frequency distribution, relative frequency distribution, or percent frequency distribution of quantitative data constructed by placing the class intervals on the horizontal axis and the frequencies, relative frequencies, or percent frequencies on the vertical axis.

Frequency Distribution

A summary showing how often different values occur in a dataset, typically presented in a table or graph.

Relative Frequency

The ratio of the number of times a particular value occurs in a set of data to the total number of observations.

Business Administration

The management and organization of business operations and decision-making processes in companies and organizations.