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Question: Refer to Example, "Dull Rats," which was done by using a completely randomized design.
a. What were the treatments in this experiment?
b. Were the experimental units the 60 individual rats or the 12 individual experimenters? Explain.
c. Explain how the experiment could have been done using a matched-pair design instead.
Example: Dull Rats In a classic experiment that was designed to test whether the experimenter's expectations could really influence the results, Rosenthal and Fode (1963) deliberately conned 12 experimenters. They gave each one five rats that had been taught to run a maze. They told six of the experimenters that the rats had been bred to do well (i.e., they were "maze bright") and told the other six that their rats were "maze dull" and should not be expected to do well.
Is opinion equally divided on this legislative issue? Use α = 0.05. What is the p-value? What sampling assumptions are being made?
Under President Washington, Secretary of War Henry Knox had hoped to pursue a more peaceful policy with the Indians. How did U.S. policy concerning the Indians unfold in the 1790s?
A regression equation was computed to be Y'=35+ 6X. The value of the 35 indicates that
Kris Lee, the owner and manager of the Quality Hardware Store, is reassessing his inventory policy for hammers.
She randomly surveys 426 schoolmates and finds that 150 report they fear public speaking. Conduct a hypothesis test at the 5% level of significance to determine if the percent at her school is less than 40%
What is the underlying variable that indirectly correlates these 2 variables? What other variables could you identify as having an indirect relationship?
(AM) Calculate the 95% confidence interval for the difference between the mean Anger-In score for the athletes and non-athletes. What can you conclude?
Find a 95% jackknife con?dence interval for the population mean mileage of the rental cars of this company.
Following are speeds of 40 cars clocked by radar on a particular road in a 35-mph zone on a particular afternoon; Make (a) a frequency table, (b) a histogram, and (c) a frequency polygon. Then describe the general shape of the distribution.
If the sample size (n) is large, and the sample is a random sample, then the distribution of the sample mean x-bar is approximately a:
To obtain information about the time it takes to perform routine service, Accu-Copiers has collected data for 10 service calls.
If the manufacturer guarantees the terminals for 3 years (and will replace them if they malfunction), what percentage of terminals will be replaced?
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