Georgeanne Calculated Descriptive Statistics for the Age of Residents in a Nursing

question 159

Multiple Choice

Georgeanne calculated descriptive statistics for the age of residents in a nursing home.She reported the mean age as 75 years,with a standard deviation of 10 years.Later she found that she had made an error in her calculations.One resident's age was entered as 27 when it should have been 72.When this correction is made

• A) the standard deviation for the data set will decrease.
• B) the standard deviation for the data set will not change.
• C) the standard deviation for the data set will increase.
• D) the correlation coefficient for the data set will become negative.

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Definitions:

Regression Formula

An equation used in statistical analysis to predict the value of a dependent variable based on one or more independent variables.

College GPA

The average result of all the grades achieved by a student throughout their college or university study period, usually on a scale from 0 to 4.0 or 5.0.

High School GPA

A cumulative measure that reflects the average grade of a student throughout their high school career, typically on a 4-point scale.

Regression Line

A line through a scatter plot of data points that best expresses the relationship between those points, often used in predictive analytics.