Statisticians Have Determined That the Sample Variance Is A(n)_____ Estimator

question 99

Multiple Choice

Statisticians have determined that the sample variance is a(n) _____ estimator of the population variance in that it _____ the population variance across all possible random samples of a given size.

• A)unbiased;accurately estimates
• B)unbiased;overestimates
• C)biased;overestimates
• D)biased;underestimates

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Definitions:

Mode

The value that appears most frequently in a given set of data, commonly used in statistics to describe central tendency.

Median

The middle value in a set of data when arranged in ascending or descending order, or the average of the two middle values if the set has an even number of values.

Mean

A statistical measure representing the average value of a set of numbers, calculated by dividing the sum of all values by the number of values.

Physiological Measures

Measurements assessing physical reactions such as heart rate or sweating.