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Perform a one-way ANOVA to assess whether there are significant differences in mean change in percent stenosis among the four groups.
do males and females differ in the amounts they spend on valentines day? the average expenditure in a sample of 40 male
A first year medical school class (n = 200) took a first midterm examination in human physiology. The results were as follows (_X = 65, S = 7). Explain how you would standardize any particular score from this distribution, and then solve the follo..
is there any difference between the proportion of americans who wish they were rich and the proportion of canadians who
Blood type AB is found in only 3% of the population†. If 260 people are chosen at random, find the probability of the following. (Round your answers to four decimal places.)
A researcher was interested in the attitudes towards equal rights among stay at home moms and women with jobs outside the home. She creates a survey that measures attitudes toward equal rights, administers it to a sample of 20 women. Conduc..
a restaurant has five entrees seven main courses and 10 deserts. in how many ways can you select two dishes on the
a) Do a test to see if workers attitudes on this matter have changed using a 90% alpha. b) Explain to management what your findings are and what this suggests about future decisions vs work options.
Take a confidence interval for the difference in the average of renting between the first andthird hotel.
How large a sample size, n, should they recruit in order to obtain a confidence interval with margin of error ± 3% based on this prior guess?
A computer diskette manufacturer is concerned that some diskettes have bad sectors that would cause a diskette to hold less information than it was intended to hold.
prince edward island fisheries and environment has been feeding a special food to rainbow trout fingerlings in a pond.
Previous studies have indicated the standard deviation of annual earnings for college students is $850. How large a sample would need to be taken to estimate the mean for college students' annual earnings to within $200 with 99% confidence?
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