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Exam 15: Frequency Distribution, Crosstabulation, and Hypothesis

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Question 41

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A statistic that indicates the distribution's dispersion is a .

A) measure of shape
B) measure of occasion
C) measure of variability
D) measure of location

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Question 42

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The is used as a measure of the strength of association in the special case of a table with two rows and two columns (a 2 × 2 table) .

A) Cramer's V
B) chi- square coefficient
C) contingency coefficient
D) phi coefficient

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Question 43

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If the calculated value of the test statistic is less than the critical value of the test statistic (TS _CR), the null hypothesis is rejected.

The difference between the mean and an observed value is called the deviation from the mean.

The F test of sample variance may be performed if it is not known whether the two populations have equal variance. In this case the hypotheses are .

The tendency of the deviations from the mean to be larger in one direction than in the other is called skewness.

In hypothesis testing, the observations are paired so that the two sets of observations relate to the same respondents.

If the kurtosis is positive, the distribution is more peaked than a normal distribution.

Give three reasons why cross- tabulation is widely used in marketing research.

The is a statistic that assumes that the variable has a symmetric bell- shaped distribution and the mean is known (or assumed to be known) and the population variance is estimated from the sample.

The alternative hypothesis: the percentage of Internet users who use the Internet for shopping is greater than .40, is a .

The is the difference between the 75th and 25th percentile.

The McNemar test is another paired sample nonparametric test that is used in the special case of a binary variable where the researcher wishes to test differences in proportions.

In SPSS, if the data are interval scaled and only the summary statistics are desired, the DESCRIPTIVES procedure can be used.

If a variable is measured on a nominal scale, the median should be used.

The can be used to assess the strength of association in a table of any size.

A mathematical distribution whose objective is to obtain a count of the number of responses associated with different values of one variable and to express these counts in percentage terms is a .

Which of the following statements is true concerning cross- tabulations with two variables?

To balance the two types of errors, alpha (a) , also known as _ , is often set at .01 or .05.

For the parametric case, involving proportions for two independent samples, the null and alternative hypotheses are . A) H₀: a₁² = a₂² H₁: a₁² × a₂²