In Conjunction with the Housing Foreclosure Crisis of 2009, Many

question 108

Multiple Choice

In conjunction with the housing foreclosure crisis of 2009, many economists expressed increasing concern about the level of credit card debt and efforts of banks to raise interest rates on these cards. The banks claimed the increases were justified. A Senate subcommittee decided to determine if the average credit card balance depends on the type of credit card used. Under consideration are Visa, MasterCard, Discover, and American Express. The sample sizes to be used for each level are 25, 25, 26, and 23, respectively. State the number of degrees of freedom available for determining the between-samples variation.

• A) 6
• B) 5
• C) 2
• D) 3

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Definitions:

Normal Distribution

Data points nearest to the mean occur more frequently in this symmetric probability distribution, with diminishing occurrences of data points as they deviate from the mean.

Standard Deviation

A measure of the dispersion or spread of a set of data points relative to their mean.

Mean

The average of a set of numbers, calculated by dividing the sum of the values in the set by their number.

Uniform Distribution

A type of statistical distribution where all outcomes are equally likely; each number within a certain range has an equal chance of being selected.