Exam 17: Nonparametric Statistics

Personnel specialist,Steve Satterfield,is assessing a new supervisor's ability to follow company standards for evaluating employees.Steve has the new supervisor rate five hypothetical employees on a scale of one to ten.He is interested in how the new supervisor's ratings correlate with company norms for these benchmark cases. The Spearman rank correlation coefficient is ___________.

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

A Mann-Whitney U test was performed to determine if there were differences in the cost of tuition at a Texas state university versus an Oklahoma state university.The total cost,including room,board,and books for 24 freshman attending a Texas university were computed and compared to the total cost for 20 Oklahoma state university students.The U statistic was calculated to be 38.78 based on the sample sizes of 24 and 20.What is the z value for this test?

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

The one-sample runs test is a ______________________.

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

The one-sample runs test is a nonparametric test of randomness in the sample data.

Statistical techniques based on fewer assumptions about the population and the parameters are called _______.

The Kruskal-Wallis test is to be used to determine whether there is a significant difference in the satisfaction rating (alpha = 0.05)between three brands of boxed cake mix.Shoppers were asked to rate their satisfaction on various attributes and an aggregate satisfaction score ranging from 1-50 was computed.The following data were obtained: For this test,how many degrees of freedom should be used?

In the one-sample runs test for randomness of the observations in a large sample the sampling distribution of R,the number of runs,is approximately binomial.

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.

The alternate hypothesis for a one-sample runs test is __________________.

No assumptions on the distribution of the difference are needed for the use of the Wilcoxon matched-pairs signed rank.

Nonparametric statistical techniques are based on fewer assumptions about the population and the parameters compared to parametric statistical techniques.

Suppose a research uses the Mann-Whitney test to determine if there is a difference in the volume of text messages sent by a high school student living in a rural area versus an urban area during the month of December.Eight rural high school students and 9 urban high school students were included in the study.If,among all 17,the sum of the ranks W₁ produced from the rural high school students is 72,the U statistic is __________

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 is 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 null hypothesis?