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In order to determine whether or not a driver's education course improves the scores on a driving exam, a sample of six students were given the exam before and after taking the course. The results are shown below:
Score ScoreStudent Before the Course After the Course
1 83 87
2 89 88
3 93 91
4 77 77
5 86 93
6 79 83
Use ? = 0.1 and test to see if taking the course actually increased scores on the driving exam (perform all six steps of hypothesis testing, including p-values).
the probability that a household is both prosperous and educated is P (A and B) = 0.082. What is the probability P (A or B) that the household selected is either prosperous or educated.
First explain what the Gini coefficient is and what hypothetical Gini values of 0 and 1 mean. Sort the data by the Gini coefficient in 2000 and look at the list of countries.
Determine the proportion of variation in grade that can be explained by the linear correlation between the grade and the number of credit hours earned at the same time of taking the course.
Caselet on McDonald’s vs. Burger King - Waiting time
Which of the following best explains how the F ratio examines differences among groups? A. The critical F is compared to the critical t.
Based on a scatter diagram, would you estimate the linear correlation coefficient to be:
Dr. Bundy recently earned permission from the warden of a local prison to use prisoners to study the effects of the drug Zoloft on depression.
It has been evaluated that 30% of all farms are family-owned. In sample of 12 farms, determine the probability that exactly 3 farms are family owned?
Does this data indicate that the sentiment for increasing the speed limit is different for the two groups of residents? Let p1 refer to the urban population.
Suppose that population variances from both kinds of digital cameras are equal, is there evidence of difference in mean battery life between two kinds of digital cameras.
From a population of cereal boxes marked "12 ounces," a sample of 81 boxes is selected and the contents of each box is weighed. You want to test whether the population mean is different from 12 ounces.
What is your initial perception of this information? What are other ways, beyond looking at the p-value alone, you could use to try to interpret what this outcome of r(2398) = -.21 tells us about the relationship between length of time taking drug..
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