When σ Is Unknown, the Margin of Error Is Computed

question 91

Multiple Choice

When σ is unknown, the margin of error is computed by using:

• A) normal distribution.
• B) t-distribution.
• C) the mean of the sample.
• D) The margin of error is also unknown.

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Definitions:

Standard Deviation

A statistical measure of the dispersion or variability in a data set, indicating how spread out the data points are from the mean.

Average Price

The mean cost of goods or services calculated by dividing the total sum of all prices by the number of prices being considered.

Bar Graph

A visual representation of data using rectangular bars to show the comparative sizes of various categories.

Distribution Of Scores

The spread of all values, or scores, in a data set, often visualized through graphs and commonly analyzed to understand patterns and predict future outcomes.