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1. Makers of generic drugs are required to demonstrate that their generic drug does not differ significantly from the "reference" drug it is intended to imitate. In an experiment to compare reference drugs to generic drugs, 30 subjects were given both a reference drug and the generic drug, with the order in which they received the drugs randomized. For all subjects, a washout period separated the two drugs so that the first drug had disappeared from the bloodstream before the second drug was given. The response was the difference in an absorption measure for the generic and the reference drug (generic measure - reference measure). None of the differences was equal to zero. The signed rank test is to be used to determine if the drugs differ significantly in absorption. If the responses have a continuous distribution that is not affected by the different treatments, W+ has meanA. 465.0.B. 232.5.C. 48.6.
2. A researcher wishes to compare the effect of the rate of stepping on heart rate in a step-aerobics workout. A collection of 9 adult volunteers was randomly divided into three groups of 3 subjects each. Each group did a standard step-aerobics workout with group 1 at a low rate of stepping, group 2 at a medium rate of stepping, and group 3 at a high rate of stepping. The mean heart rate at the end of the workout for all subjects was determined in beats per minute. Assume the data for the three groups are independent. The observations are given below.
Group 1 95.7 92.6 102.6Group 2 102.3 99.4 105.4Group 3 107.3 125.4 119.2
The
A. sum of ranks for the three groups are R1 = 8, R2= 13, and R3 = 24.B. value of the Kruskal-Wallis statistic is H = 5.96.C. Both choices are correct
A simple random sample of 1000 Americans found that 61% were satisfied with the service provided by the dealer from which they bought their car.
This model is fit to the data using the method of least squares using statistical software, and the following parameter estimates and their standard errors are obtained.
An SRS of 100 of a certain popular model car in 1993 found that 20 had a certain minor defect in the brakes. An SRS of 400 of this model car in 1994 found that 50 had the minor defect in the brakes. Let p1 and p2 be the proportion of all cars of t..
A study of cardiovascular risk factors compared heavy smokers, light smokers, and nonsmokers. Both men and women were included in the study and gender differences were also to be investigated. One of the variables measured was the heart rate after..
The 50 members of the placebo group had blood pressure lowered by an average of 15 points with standard deviation 8 points. To analyze this information we will use a, When testing whether or not the increases in spending are different, the test is ..
Take a confidence interval for the difference in the average of renting between the first andthird hotel.
The chance both flights are full is 0.6. Are the two flights being full independent events and What was the mean ranking for the females in this class
The sample size n, the sample means, and the sample standard deviations for the two groups are given
I have fit a line to data representing cholesterol readings for 28 individuals starting a cholesterol reducing drug. The computer provides the following output, The degrees of freedom for the t test for the slope are
The 95% prediction interval for a new patient with a 2-day cholesterol level of 220 is
Assume the data for the three groups are independent and the data are approximately Normal. The P-value is less than 0.01. The correct conclusion is that
An experiment was carried out to assess the effects of four tomato varieties and four planting densities on yield. There were 64 plots, and each of the 16 factor combinations was randomly assigned to 4 plots
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