In a Statistics Class, 10 Scores Were Randomly Selected with the Following

question 120

Multiple Choice

In a statistics class, 10 scores were randomly selected with the following results (mean = 71.5) : 74, 73, 77, 77, 71, 68, 65, 77, 67, 66. What is the variance?

• A) 22.72
• B) 12.00
• C) 4.77
• D) 516.20
• E) 144.00

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Definitions:

Square Root

A value that, when multiplied by itself, gives the original number, representing the inverse operation of squaring.

Population

The total set of individuals, items, or data from which samples can be drawn for statistical analysis.

Sample Value

A single measurement or observation from a larger set of data collected from a population.

Significant Difference

A statistical measure indicating that the observed differences between two or more groups are not likely due to chance.