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1. Nonparametric tests are used when
A. the data are normal.B. the data are skewed.C. the data are counts.
2. The Kruskal-Wallis rank test is a nonparametric replacement for
A. a paired t test.B. two independent samples t test.C. one-way ANOVA.
3. The Wilcoxon rank sum test tests a null hypothesis that
A. the two distributions have the same mean.B. the two distributions have the same median.C. the two distributions are the same.
4. A sample of breakfast cereals yields the following data on the grams of carbohydrates per serving.
19 23 26 21 25 28 24 23 23 13 25 26
The rank assigned to a cereal with 25 grams isA. 8.B. 8.5.C. 9.
Use the list of random digits below to assign 4 men and 2 women to the shark fin treatment. Read the table from left to right, first selecting the 4 men and then the 2 women. Use the numerical labels given in the chart to the names.
Below is a plot of the Olympic gold medal winning performance in the high jump (in inches) for the years 1900 to 1996.
Let be the average of the pay you receive for the first and second week. Find the sampling distribution
These can have a large impact on tenure and promotion decisions at many institutions. One particular instructor had ratings in 3 courses in one semester as given by the table below for the statement "The instructor is an excellent teacher.
The margin of error for a 95% confidence interval estimate for the proportion of all students with cell phones is
Subjects at both sites were classified as dropouts if they left the study before the conclusion, or completers if they finished the study
Draw two pie charts, which allow the total yearly exports to be compared. Explain the trend in the export of fish as shown in the two pie charts.
Assuming the nurses surveyed were a simple random sample from the population of all nurses in the United States, find the appropriate null hypothesis for these data
Reading highway signs is not always easy, especially if your vision is imperfect. Vision in general tends to deteriorate with age. Two researchers conducted a study to determine if the distance at which a standard highway sign could be recognized ..
Let X be the number of correct guesses by your friend in the 100 trials and Use the Normal approximation with the continuity correction - Which of the following might be reasonably modeled by the binomial distribution
A bank wants to get new customers for their credit card. They try two different approaches in their marketing campaign. The first promises a "cash back" reward; the second promises low interest rates. A sample of 500 people are mailed the first br..
Sampling variability refers to the idea that different samples will include different individuals
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