Exam 17: Nonparametric Statistics

In the Wilcoxon test of the differences between two populations,the value z statistic was calculated to be 1.80.If the level of significance is 0.10,which of the following decisions is appropriate?

The HYPERLINK "http://www.statisticssolutions.com/mann-whitney-u-test" Mann-Whitney U-test is used to test whether three or more independent HYPERLINK "http://www.experiment-resources.com/sample-group.html" samples of observations are drawn from the same or identical distributions.

Which of the following tests might be used to compare the means of two populations if the samples are related?

The nonparametric counterpart of the t test to compare the means of two independent populations is the Mann-Whitney U test.

The nonparametric alternative to the one-way analysis of variance is the _______.

Statistical techniques based on assumptions about the population from which the sample data are selected are called parametric statistics.

The Spearman correlation coefficient is calculated for a set of data on two variables,x and y. It appears that as the rank of x increases,the rank of y is decreasing. We would expect the Spearman correlation coefficient to be ________.

Two stock analysts rank five investment portfolios for overall performance and risk. The Spearman rank correlation coefficient is ___________.

Performance records for 18 salespersons are selected to investigate whether compensation methods are a significant motivational factor. A Kruskal-Wallis test is to be performed with $\alpha$ = 0.01. The critical chi-square value is _______.

The alternative hypothesis for the Friedman test is that at least one treatment is different from at least one other treatment.

The sampling distribution of R,the number of runs,in the one-sample runs test for randomness of the observations in a large sample is approximately normal if H₀ is true.

The nonparametric alternative to analysis of variance for a randomized block design is the Friedman test.

The methods of parametric statistics require ________________.

A perfect Spearman correlation of +1 or −1 between two variables indicates

The appropriate test for comparing the means of two populations using ordinal-level data from two related samples is the Wilcoxon test and not the Mann-Whitney U test.

A quality control supervisor wishes to determine whether the following measurements are random: For this purpose,the supervisor computes the median of the thirty observations above and compares each measurement to the median to perform a runs test.She uses a significance level of 0.05.The appropriate decision is ______.

Nonparametric statistics are sometimes called _______________.

A local pediatrician office is interested in the 'no-show' appointment count for each of the 4 pediatricians.'No-show' appointments represent lost revenues because the physician will be Idle when patients do not show for their scheduled appointments.Using the data in the table Below and an alpha of .10,what is the appropriate decision?

The null hypothesis in the Kruskal-Wallis test is _______.

The methods of parametric statistics can be applied to nominal or ordinal data.