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A two factory research is used to evaluate the effectiveness of a new blood pressure medicine. In this two factor study, Factor A is medication vs no medication. Factor B is male vs female. What pattern of results should be obtained if the medication works as predicted?
A. At least one of teh main effects must also be significant.
B. Both of the main effects must also be significant.
C. Neith of the two main effects can be significant
D. The significance of the interaction has no implications for the main effects.
At the time she was hired as a server at the restaurant, Beth was told, "You can average more than $20 a day in tips." Over the first 31 days she was employed, the mean daily amount of her tips was $21.76,
Indicate which would be the independent variable and which would be the dependent variable in each of the following:
Under what circumstances should a nonparametric test be used? Explain. What are the strengths and weaknesses of nonparametric tests?
A Pew research study recently randomly selected two groups of people, men and women and asked them if they agree with the following statement:
430 randomly selected light bulbs were tested in a laboratory, 224 lasted more than 500 hours. Find a point estimate of the proportion of all light bulbs that last more than 500 hours.
You are trying to set up a portfolio that consists of a corporate bond fund and a common stock fund. the following information about the annual return (per $1,000)of each of these investments under different economic condition is available
assume that a quality characteristic is normally distributed. an x-bar control chart is constructed with 3 sigma
A sample of 35 different HR departments found that employees worked an average of 240.6 days a year. If the population standard deviation is 18.8 days
Estimating the sample standard deviation using normal score - Find the sample standard deviation?
For the sample of 32 lg us cities the correlation between the mean # of sq ft per office worker and the mean monthly rental rate in the central business district is the -.363 at the .05 significance level
1.do students tend to improve their sat mathematics sat-m score the second time they take the test? a random sample of
A partial computer output from a regression analysis as follows. The regression equation is:
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