Exam 15: Frequency Distribution,cross-Tabulation,and Hypothesis Testing

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.

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

The mode represents the highest peak of the distribution.

Hypothesis-testing procedures can be broadly classified as parameter or nonparameter based on the measurement scale of the variables involved.

The ________ is a skewed distribution whose shape depends solely on the number of degrees of freedom.As the number of degrees of freedom increases,the distribution becomes more symmetrical.

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

________ is a test statistic that measures the association between two ordinal-level variables.It makes an adjustment for ties and is most appropriate when the table of variables is not square but a rectangle.

The Mann-Whitney U test is a statistical test for a variable measured on an ordinal scale,comparing the difference in the location of two populations based on observations from two independent samples.

If the entire sample is changed by adding a fixed constant to each observation,then the mean,variance,and median change by the same fixed amount.

________ occurs when the sample results lead to the rejection of a null hypothesis that is in fact true.

The ________ is the value that occurs most frequently.

When the data points are scattered,variance is small.

Which of the following statements is not true about parametric tests?

A Kolmogorov-Smirnov one-sample test was conducted.The largest absolute difference between the observed and normal distribution was K = 0.222.The sample size was only 30 therefore,the approximate formula was used and the critical value for K was 0.248.Because the calculated value of K is ________ than the critical value,the null hypothesis ________ be rejected.

If the samples used in the Mann-Whitney U test are from the same population,the distribution of scores from the two groups in the rank list should be ________.

A statistic that describes a location within a data set is a ________.

The probability of Type II error (α)is also called the level of significance.

The variance can never be negative.

The degrees of freedom for the t statistic to test the hypothesis about two independent samples is ________.

Also known as beta error,________ occurs when the sample results lead to the nonrejection of a null hypothesis that is in fact false.