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A researcher has studied subjects' ability to learn to translate words into Morse code. He has experimented with two treatment conditions: in one condition, the subjects are given massed practice; they spend 6 full hours on the task. In the other condition, subjects are given distributed practice; they also spend 6 hours, but their practice is spread over four days, practicing 2 hours at a time. After the practice, all subjects are given a test message to encode; the dependent variable is the number of errors made. The researcher has matched the subjects on intelligence. The results are in the following table. Decide which statistical test would be appropriate, carry out the test, and evaluate the outcome. Assume a significance level of .05 and that the direction of the outcome has not been predicted. What are we dealing with here? t test....what must you do with the null hypothesis guys (accept or reject)?
Massed Practice Distributed Practice
S1 6 S1 5
S2 4 S2 3
S3 3 S3 2
S4 5 S4 2
S5 2 S5 3
What are the requirements for applying the hypothesis test for the difference in two population proportions? What are the calculations (computations)?
In the past, of all the students enrolled in "Basic Business Statistics" 10% earned A's 20% earned B's, 30% earned C's, 20% earned D's and the rest either failed or withdrew from the course.
The data below shows the time to process an inpatient admission, before and after a system usage training session was given. The following hypotheses were formulated for this study.
Please select each answer that is true for the following experiment:
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Write the steps needed to construct an empirical sampling distribution of the range. What is the name of the standard deviation of this sampling distribution?
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How did the rivalry between the United States and the Soviet Union express itself during the Cold War?
37 percent of managers have MBA degrees. Using probability formulas. Determine the proportion of employees who are managers and have MBA degrees.
Consider the following productivity measures (on a scale from 0 to 100) for a population of employees.
If the FDA did not approve the new drug, it could still be sold overseas, and the company could make $200 million over the same number of years. Construct a decision tree and recommend a decision on whether to develop the new drug.
Consider a survey concerning the ages of 800 students in a college. The results can be summarized as follows
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