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A researcher administers a treatment to a sample of n = 25 participants and uses a hypothesis test to evaluate the effect of the treatment. The hypothesis test produces a z-score of z = 2.77. Assuming that the researcher is using a two-tailed test.
The researcher rejects the null hypothesis with a= .05 but not with a= .01.The researcher should reject the null hypothesis with either a= .05 or a= .01.The researcher should fail to reject H0 with either a= .05 or a= .01.Cannot answer without additional information.
Adele Weiss manages the campus flower shop. Flowers must be ordered three days in advance from her supplier in Mexico. Advance sales are so small that Weiss has no way to estimate the demand for the red roses.
Comment on your statistical findings? Do you agree with your initial statement regarding the preference of an ANOVA over a t-test when examining more than two groups?
Assume that the weights of coconuts are normally distributed with a mean weight of 17.6 pounds and a standard deviation of 1.2 pounds.
What other information would you like to know to answer the question about salary equity between the genders? Why?
According to the U.S. Bureau of the Census, 75% of adults regularly drank alcohol in 1985. An investigator predicts that fewer adults drink now than drank then.
Given that the mean of all 102 atomic numbers is 51.794, and the population standard deviation is 29.804, what is the probability that the mean of the 40 atomic numbers selected by the student will be at least 57.3?
Determine the following probabilities: Events A and B are mutually exclusive events defined on common sample space.
Suppose that the sales manager of a large automotive parts distributor wants to estimate as early as April the total annual sales of a region.
Indicate which would be the independent variable and which would be the dependent variable in each of the following:
Sstandard deviation was found to be 3.3 minutes. Is there evidence to reject the manager's claim at alpha =.02? Perform an appropriate hypothesis test.
Determine whether each of the distributions given below represents a probability distribution. Justify your answer.
Working at Company X is very stressful for any human being. Medecines Sans Frontires stepped in to see if there is any possible violations of human rights at the notorious Company X.
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