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When using dummy variables in a regression equation to model a qualitative or categorical variable, the number of dummy variables should equal to
a. one less than the number of categories.
b. one more than the number of categories.
c. the number of categories.
d. the number of other independent variables in the model.
Consider the following news headline, "Cigarette Smokers Make Lower College Grades than Nonsmokers" The news article goes on to say that researchers at a university collected information on rate of cigarette smoking (total number of cigarettes sm..
The grade point average of the students at UTC is 2.80 with a standard deviation of 0.84. The grade point average of students at UTK is 2.4 with a standard deviation of 0.84. Which university shows a more dispersed grade distribution?
A recent study stated that if a person chewed gum, the average number of sticks of gum he or she chewed daily was 8. To test the claim, a researcher selected a random sample of 36 gum chewers and found the mean number of sticks of gum chewed per d..
What is the probability that a randomly selected mango weighs less than 14 ounces?
Taking care to control for weather conditions and other variables as much as possible. Define the null hypothesis.
An experimenter is randomly sampling 5 objects in order from among 49 objects. What is the total number of samples in the sample space?
Analyze the data using linear contrasts to make the following comparisons:
Small bag of Skittles candies has following assortment: red (12), blue (5), orange (15), brown (0), green (16), and yellow (7). Create the probability distribution for x.
Collapse the response categories in the following tables so that it meets the assumptions of the chi-square test; than perform the test.
In terms of p , the researcher should test which of the following null and alternative hypotheses?
Assume the observed value of the test statistic is 1.53. What is the smallest level for which there is sufficient evidence to reject H 0 (i.e. the p-value for this test)?
Significance level to test the claim that less than half (.5) of all executives identify that error as being the most common job interviewing error.
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