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College students attitudes toward parents. Researchers at the University of South Alabama compared the attitudes of male college students toward their fathers with their attitudes toward their mothers (Journal of Genetic Psychology, March 1998). Each of a sample of 13 males was asked to complete the following statement about each of their parents: My relationship with my father (mother) can best be described as: (1) awful, (2) poor, (3) average, (4) good, or (5) great. The following data were obtained:
(a) Specify the appropriate hypotheses for testing whether male students' attitudes toward their fathers differ from their attitudes toward their mothers, on average.
(b) Conduct the test of part a at α = .05. Interpret the results in the context of the problem.
Using the .10 level of significance, can we conclude that the assembly time using the new method is faster?
what distinguishes raw scores from difference scores besides the fact that difference scores are used in t-statistic
In chapter 9 we learned that it is possible to use a sample of observations to make inferences about an entire population, or as Hubbard puts it "How observing some things tells us about all things."
Suppose that 20% of the employees had problems with both absenteeism and turnover. Use this information to find the probability that an employee selected from the group surveyed had problems with either absenteeism or turnover.
explain how we develop the regression equation and how we use it in the predictive process. what role does the standard
Independent samples are taken of a random variable X.- If the PDF of is uniform over the interval - Write the approximation as an equation.
Create the 99% confidence interval on difference of average ages for viewers of the two TV programs. How can you interpret interval?
To estimate this proportion he went to a large student parking lot during the middle of a class day. He found that 325 out of 1037 cars (31%) were red.
Conduct a hypothesis test to determine whether the whisper number justifies a conclusion of a statistically significant increase in the consensus estimate of economists. Use a = .01 as the level of significance.
At 99% confidence, test to determine if there is sufficient evidence to indicate that process 2 takes a significantly longer time to manufacture the Zip drives.
Construct a control chart for the proportion of dissatisfied customers. Revise the control limits, assuming special causes for points outside the control limits.
three cards are randomly selected without replacement from a standard deck of 52 playing cards. compute the conditional
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