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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
Suppose the company that has produced "Get Slim X" now produces an even better diet pill. This new and improved version is called "Get Super Slim X."
Compare and contrast the similarities and differences between the two scores and explain when and why you would use each.
ssume that these distributions are distributed as normal random variables with the means and standard deviations given previously. Find the probability that the return for common stocks will be greater than 8%.
What is the standard deviation of the number of service calls and compute the coefficient of variation of the number of service calls.
A GSS asked. "What do you think is the ideal number of children for a family to have? the 497 female who responded had a median of 2, mean of 3.02 and standard deviation of 1.81 (a) Report the point estimate of the population mean.
You wish to evaluate the proportion of customers who are satisfied with their supermarket at level of confidence of .92 and in .025 of true value. How large of sample is required?
If samples of size 224 were repeatedly selected from the population of children born to mothers with HIV antibody, what would be the mean number of infected children per sample?
If the basket ball player is a 74% free throw shooter, then, on average, how many free throws will he or she make in a game with eight free throw attempts?
Discuss the underlying causes that might explain the trend. (c) Use Excel, MegaStat, or MINITAB to fit three trends (linear, quadratic, and exponential) to the time series.
Assume that a random variable, x, is distributed according to a normal distribution with mean 46 and standard deviation 12. (a) What is the standard error of the estimate, x-bar, if a sample of size 25 is taken?
How large should n be so that a 90% confidence interval for µ has a margin of error and What is the P-value for a test of the hypotheses
Find the z-score for each student and indicate which one has a better relative position. An Art Major earned a grade of 46 on an exam with = 50 and s = 5.
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