The Mean

question 20

Multiple Choice

The mean.

• A)is the most frequently occurring score in a distribution
• B)is the sum of a set of scores divided by the number of scores summed
• C)is the middle score in a distribution
• D)divides a distribution of scores into two equal parts

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Definitions:

Population Values

The actual numerical values representing a characteristic of every individual member of a population.

Confidence Level

A measure indicating the probability that a given range includes the true value of an estimated parameter.

Confidence Interval

A confidence interval is a range of values, derived from sample statistics, that is likely to contain the value of an unknown population parameter, with a specified level of confidence.

Alpha (α)

In investing, alpha represents the excess returns of a portfolio relative to the return of a benchmark index. In statistics, it often denotes the level of significance in hypothesis testing.