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One reads that a business school graduate with an undergraduate degree earns more than a high school graduate with no additional education, and a person with a master's degree or a doctorate earns even more. To test this, a random sample of 25 executives from companies with assets over $1 million was selected. Their incomes, classified by highest level of education, follow.
Income ($ thousands)
High School or less
Undergraduate Degree
Master's Degree or More
45
49
51
47
57
73
53
85
82
62
59
39
81
94
43
84
89
54
92
95
Test at the .05 level of significance that there is no difference in the arithmetic mean salaries of the three groups. If the null hypothesis is rejected, conduct further tests to determine which groups differ. How do we go about this?
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The mean age of 25 randomly selected college seniors was found to be 23.5 years, and the standard deviation of all college seniors was 1.3 years. Which of the following is the correct symbol for 1.3 years?
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A social psychologist reports that "in our sample, ethnocentrism was significantly higher (P
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The researcher found that Lincoln's educational score did not correlate with the expected variables.
Evaluate a simple aggregate price index for 2004. Use 2000 as the base period - Estimating the simple aggregate price index.
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Let A be the event that a randomly chosen employee has a college degree and B the event that the chosen employee's income is more than $50,000.
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