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A regional commuter airline selected a random sample of 25 flights and found that the correlation between the number of passengers and the total weight, in pounds, of luggage stored in the luggage compartment is 0.94. Using the .05 significance level, can we conclude that there is a positive association between the two variables?
An advantage of the permutation test over the t test for a difference in means, can Permutation tests be used for tests when we believe the two populations differ under the null hypothesis.
Conduct post hoc comparisons with the LSD method. Which groups differ significantly at α = 0.05?
At the .05 significance level, is there a difference in the mean number of calls per day between the two employees?
Be sure the appropriate assumptions and conditions are satisfied before you proceed.
What is Peter's median grade point at graduation? What is the shape of the grade point distribution?
Compute an F-statistic for each linear construct and determine its significance. Also, state what questions each of these contrasts address.
Solve different inventory control problems using an appropriate OR method.
To test whether there is a significant mean difference among the three.
36 values given here are based on summary statistics from research by cumming. Do you think that these data are normally distributed?
The probabilities of low, medium and high compliance are 0.3, 0.4, and 0.3, respectively
Suppose you found that in doing the hypothesis test, you were able to reject the null hypothesis. What is the most appropriate conclusion to draw?
Assume that the smiling time of eight-week old babies, in seconds, follows a uniform distribution between 0 and 23 seconds, inclusive. This means that any smiling time from 0 to and including 23 seconds is equally likely.
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