A Chi-Square Test Should Be Used with Caution When

question 22

Multiple Choice

A chi-square test should be used with caution when:

• A)the population is not assumed to be normally distributed.
• B)the total sample size exceeds 100.
• C)there is an expected frequency > 5.
• D)there is an expected frequency < 5.

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Definitions:

SSE

The sum of squared errors, which measures the total deviation of observed values from their mean in statistical models.

Confidence Interval

The interval estimate of the mean value of y for a given value of x.

Linear Regression Model

A statistical technique that models and examines the linear relationship between a dependent variable and one or more independent variables by fitting a linear equation to observed data.

Interval Estimate

An estimate of a population parameter that provides an interval believed to contain the value of the parameter. For the interval estimates in this chapter, it has the form: point estimate ± margin of error.