Exam 21: Univariate Statistical Analysis

Another name for an observed or computed significance level is _____.

Describe the chi-square test for goodness-of-fit and explain when it is the appropriate test.

When the data are interval or ratio scaled and the sample size is large, _____ statistical procedures are appropriate.

Nonparametric statistical tests are frequently referred to as distribution free.

For a one-group t-test, the degrees of freedom are _____.

In statistical testing, the significance level is commonly denoted by the symbol _____.

When a researcher wishes to analyze data that is nominal, which type of statistics is appropriate?

Failing to identify a hypothesized difference using a sample result when one really does exist in the population is which type of error?

Analyses that test hypotheses and models involving multiple (three or more) variables or sets of variables are referred to as _____ statistical analyses.

Which type of statistical analysis test hypotheses involves only one variable?

The researcher's hypothesis is generally stated in the form of a null hypothesis.

In hypothesis testing, the values that lie exactly on the boundary of the region of rejection are referred to as the ______ values.

Nonparametric statistics are based on the assumption that the data in the study are drawn from a population with a normal (bell-shaped) distribution and/or normal sampling distribution.

Compare and contrast Type I errors and Type II errors and explain which one is of more concern to researchers.

A two-tailed t-test is appropriate when the researcher has a directional hypothesis implying that an observed mean can only be greater than or less than a hypothesized value.

In hypothesis testing, the number of observations minus the number of constraints needed to calculate a statistical term is called the ______.

The appropriate test for testing hypotheses about frequencies arranged in a frequency or contingency table is the _____ test.

If the population mean is expected to be 85 and the sample mean is 80, the sample standard deviation is 20, and the sample consists of 100 consumers, the observed value of the Z-statistic is approximately _____.

A t-test is appropriate for testing hypotheses about frequencies arranged in a frequency or contingency table.

In business problems, Type II errors generally are considered more serious than Type I errors.