Adding a Constant to or Subtracting a Constant from Each

question 32

Multiple Choice

Adding a constant to or subtracting a constant from each of the scores in a distribution

• A)changes the value of the standard deviation by the amount of the constant.
• B)changes the value of the standard deviation by half the amount of the constant.
• C)changes the value of the standard deviation by 34% of the amount of the constant.
• D)does not change the value of the standard deviation.

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Definitions:

Expected Value

The weighted average of all possible values of a random variable, representing the long-term average outcome of a given situation if it were to be repeated many times.

Simple Linear Regression

A statistical method for estimating the relationship between two quantitative variables, allowing predictions of one variable given the other.

True Correlation

The actual degree of a linear relationship between two variables, excluding any error or distortion.

Linear Relationship

A type of correlation where there is a constant change rate between two variables, indicative of a straight line when graphed.