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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
Construct a 95% confidence interval estimate for the population proportion of administrative professionals who prefer cash bonuses.
James plans to prepare a report on this study for presentation to the West Coast Bell committee on health and benefits.
Assume that the significance level is alpha equals 0.05α=0.05. Use the given information to find the P-value and the critical value(s). The test statistic of z=1.60 is obtained when testing the claim that p>0.9.
They will have one beer for each tap, and no two taps will have the same beer on any given evening. How many different beer menus do they need to stock.
Based on information, compute the following: Percentage (or portion) of children who watch television less than 6.5 hours a week.
The data is given below. At 0.05 significance level, test the research hypothesis that μ, the average ratio, is greater than 675. Test the hypothesis using two approaches: the rejection region approach, and the p-value approach.
Why is the independence assumption in part c probably not realistic? Using a more realistic assumption, do you think the probability requested in part c.
suppose that a random sample of 100 public owner controlled companies in new zealand is found to give a mean audit
You are given that i = 100%, qx = 0.2, qx+1 = 0.3. There are no withdrawals. Find the expense-augmented reserves, gross-premium reserves, and asset shares.
epa studies of fuel consumption indicate compact car mileage to be normally distributed with a mean of 25.5 miles per
Select a question from your questionnaire where the responses were not at either extreme of the rating scale and change the wording to draw a mostly negative or mostly positive response.
This project will be completed and turned in individually, not as a team. You will submit a write-up of your solutions (hand written is fine).
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