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Dr johnson is a new professor teaching basic business

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Unformatted text preview: A's 20% earned B's, 30% earned C's, 20% earned D's and the rest either failed or withdrew from the course. Dr Johnson is a new professor teaching "Basic Business Statistics" for the first time this semester. At the conclusion of the semester, in Dr. Johnson's class of 60 students, there were 10 A's, 20 B's, 20 C's, 5 D's and 5 W's or F's. Assume that Dr. Johnson's class constitutes a random sample. Dr Johnson wants to know if there is sufficient evidence to conclude that the grade distribution of his class is different than the historical grade distribution. If we assume at = .05 that the null hypothesis is rejected, make a one-sentence managerial conclusion. A. Dr. Johnson's class grades don't differ from the historical course grade distribution. B. Dr. Johnson's class grades are higher than the historical course grade distribution. C. Dr. Johnson's class grades are Lower than the historical course grade distribution. D. We cannot draw a conclusion about the difference between Dr. Johnson's grades and the historical course grade distribution. 1-1065 Chapter 01 - An Introduction to Business Statistics 78. On the most recent tax cut proposal, a random sample of Democrats and Republicans in the Congress cast their votes as follows: Determine the expected frequencies for both the Democrats and Republicans who favor the tax cut proposal for the chi-square test of independence. A. 85, 118 B. 67.3, 67.3 C. 100.5, 102.5 D. 169.2, 234.8 79. On the most recent tax cut proposal, a random sample of Democrats and Republicans in the Congress cast their votes as follows: Determine the expected frequencies for both the Democrats and Republicans who oppose the tax cut proposal for the chi-square test of independence. A. 68.8, 70.2 B. 67.3, 67.3 C. 78, 61 D. 69.5, 69.5 80. At a significance level of .01, determine the appropriate degrees of freedom and the rejection point condition for this test. A. 5, 15.1 B. 1, 6.63 C. 6, 16.8 D. 2, 9.21 1-1066 Chapter 01 - An Introduction to Business Statistics 81. On the most recent tax cut proposal, a random sample of Democrats and Republicans in the Congress cast their votes as follows: Calculate the chi-square statistic for this test of independence. A. 9.51 B. 9.73 C. 10.33 D. 0.15 82. On the most recent tax cut proposal, a random sample of Democrats and Republicans in the Congress cast their votes as follows: Use a significance level of .01 and determine if the opinions on the tax cut proposal and the party affiliation are independent. A. Reject H0 B. Fail to reject H0 1-1067 Chapter 01 - An Introduction to Business Statistics 83. On the most recent tax cut proposal, a random sample of Democrats and Republicans in the Congress cast their votes as follows: Suppose, the Chi-square test of independence is performed and the null hypothesis is rejected that the vote on the issue and party affiliation are independent. Provide a one-sentence interpretation of the outcome of the test. A. The party affiliation is not independent of the votes on the tax cut proposal. B. How votes are cast on the tax cut proposal are independent of the party affiliation. C. Party affiliation does not affect how individuals vote on the tax cut proposal. D. There is insufficient evidence to determine a correlation between party affiliation and the congressman's opinion on the tax cut proposal. 84. A human resource manager is interested in whether absences occur during the week with equal frequency. The manager took a random sample of 100 absences and created the following table: Calculate the expected absences for all 5 days. A. 28 B. 20 C. 12 D. 25 1-1068 Chapter 01 - An Introduction to Business Statistics 85. A human resource manager is interested in whether absences occur during the week with equal frequency. The manager took a random sample of 100 absences and created the following table: Calculate the value of the chi-square statistic. A. 6.80 B. 9.49 C. 27.2 D. 1.36 86. A human resource manager is interested in whether absences occur during the week with equal frequency. The manager took a random sample of 100 absences and created the following table: How many degrees of freedom are associated with the chi-square test? Use α = .05 and determine the rejection point condition of the chi-square statistic. A. 5, 9.49 B. 5, 6.80 C. 4, 9.49 D. 4, 6.80 1-1069 Chapter 01 - An Introduction to Business Statistics 87. A human resource manager is interested in whether absences occur during the week with equal frequency. The manager took a random sample of 100 absences and created the following table: At a significance level of .05, test Ho: the probabilities are equal for all five days. A. Reject H0 B. Fail to reject H0 88. At a recent meeting of educational researchers, comparisons were made between the type of college freshmen attend and the numbers who drop out. A random sample of freshmen shows the following results: Determine the expected frequencies for the two cells of 4-yr public institutions that will...
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This document was uploaded on 01/20/2014.

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