Exhibit 20

question 20

Multiple Choice

Exhibit 20.6.A fund manager wants to know if the annual rate of return is greater for growth stocks (1) than value stocks (2) .The fund manager collects data on the returns of growth and value funds.Below are the sample sizes and rank sums for the Wilcoxon rank-sum test. Refer to Exhibit 20.6.Since both sample sizes are at least 10,W can be assumed to follow a normal distribution with a mean and standard deviation of:

• A)434.74 and 8100
• B)8100 and 434.74
• C)8100 and 189000
• D)189000 and 8100

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Definitions:

Independent Samples

Sets of data collected from distinct, non-overlapping populations for comparative analysis in statistical studies.

Student T-distributed

A statistical distribution applied to predict population characteristics, suitable for scenarios with a limited sample size or when the population's variance remains undisclosed.

Sample Variance

A measure of the dispersion or variability within a sample data set, representing the average of the squared differences from the mean.

Registered Democrats

Registered Democrats are individuals who have officially registered to vote as members of the Democratic Party in the United States.