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Three different brands of pain relief medication are available for minor aches and pains. It is of interest to know whether the mean time to relieve the pain differs from brand to brand. To find out, twelve individuals with minor aches and pains were randomly assigned to one of the three brands. The time to relieve the pain (in minutes) for each individual is provided in the table below.
Brand A Brand B Brand C
10 15 20
12 22 25
15 25 20
14 19 11
Given that the necessary assumptions are satisfied, can it be concluded, at the 2.5% level of significance, that not all mean times to relieve pain are equal? Formulate and test the appropriate hypotheses. Use the critical value approach
when determining the sample size needed to achieve a particular error estimate you need to know sigma. what are two
a professor is doing a study of the relationship between students grades and their part-time work. he analyses data
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For this problem state the menthod you used and show the work required to obtain the answer. Find the complete solution to each of the equation problem:
suppose that 12 observations are drawn from a normal population. the observations are 15 912 11 8 12 11 7 15 9 6 and
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X, Y, and Z are independent normally distributed random variables. The following information is known about these three variables:
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The distribution of test scores is mui=35 and a standard deviation of 15. Do students taking the supplement have significantly better memory scores? Use a one-tailed t-test with an alpha=0.05.
Using α = .05 test for significance differences among the population mean wasted time for theses three urban areas. What is the p-value? What is your conclusion?
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