If Two Variables Have a Correlation of +1.00,then

question 57

Multiple Choice

If two variables have a correlation of +1.00,then

• A) a perfect negative relationship exists between them.
• B) a perfect positive relationship exists between them.
• C) a weak relationship exists between them.
• D) it is not possible to tell the type of relationship that exists between them.

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Definitions:

Cumulative Distribution

A method of converting a frequency distribution of scores into increasing percentages as a function of the percentage of scores counted. A bar graph is often generated by placing the class interval scores along the x-axis and the cumulative percentages along the y-axis.

Frequency Polygon

A method of converting a frequency distribution of scores into a line graph. After combining scores by class interval, the class intervals are placed along the x-axis and the frequency of scores along the y-axis.

Positively Skewed Curve

A set of test scores in which the majority fall at the lower or negative end. It is said to be a positively skewed curve or distribution because a few “positive” or high-end scores have stretched or skewed the curve to the right.

Median

The middle value in a data set when it is arranged in ascending order, or the average of the two middle values if there is an even number of observations.