The Standard Deviation Measures

question 45

Multiple Choice

The standard deviation measures:

• A)The spread of data about the mean.
• B)The mean.
• C)The mode.
• D)The median.

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Definitions:

Degrees of Freedom

The number of independent values or quantities which can vary in the analysis without violating any constraints.

P(t > t)

A statistical expression used to compute the probability that the test statistic t exceeds a certain value, often used in hypothesis testing.

Skewed

A distribution that is not symmetrical around its central value, indicating that the data points tend to be more spread out on one side of the scale.

Student t

A distribution that is used in hypothesis testing, especially for small sample sizes, when the population standard deviation is unknown.