Whenever People's Incomes Increase,they Buy More Guitars

question 11

Multiple Choice

Whenever people's incomes increase,they buy more guitars.Hence a scatter diagram shows that the relationship between income and guitars purchased is

• A) a positive relationship.
• B) a linear relationship.
• C) a negative relationship.
• D) some sort of relationship, but whether it is positive or negative depends on whether income is plotted on the vertical or horizontal axis.
• E) a U-shaped relationship.

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Definitions:

Observed Frequency

The observed frequency is the actual number of times an event occurs in a dataset or experiment.

Expected Frequency

Expected frequency is a term in statistics indicating the number of times an outcome is anticipated to occur within a set of observations, based on probability.

Sampling Distribution

The distribution of probabilities for a statistic that is based on a random sample.

Chi-squared Distribution

A distribution that arises from the sum of the squares of a number of independent random variables.