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107年 - 107 東吳大學_碩士班招生考試_企業管理學系(B組)：統計學#111185
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5. To verify that a frequency distribution for sample data is normally distributed, a_______dtatistic is used to test the hypothesis that the sample data is normally distributed. (2 分)
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2. In frequency distributions, classes are collectively exhaustive if each individual, object, or measurement is included in only one category. (2 分)
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3. Place these variables in the following classification tables. For each table, summarize your observations and evaluate if the results are generally true. For example, salary is reporred as a continuous quantitative variable. It is also a continuous ratio-scaled variable. (8 分) a. Hair color b. Rating of a Finance Professor c. Dress size d. Number of patients seen
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(1)當樣本數固定,若降低a,則β會______；
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(2)當固定拒絕域,要利用何種方法同時降低a及β?__________。
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6. For a two-tailed hypothesis test, the test statistic is z = 2.65. What is the p-value? (2 分)
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7.On the first statistics exam, the coefticient of determination between the hours studied and the grade earned was 80%. The standard error of estimate was 10. There were 20 students in the class. Develop an ANOVA table for the regression analysis of hours studied as a predictor of the grade carned on the first statistics exam. (8分)
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a. Consider the following output. Compute the coefficient of multiple determinations, adjusted coefficient of multiple determinations and correlation coefficient. (6 分)
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b. Conduct a global test of hypothesis from the preceding output. Does it appear that any of the regression coefficients are not equal to zero? (2 分)
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c. Conduct a test of hypothesis on each independent variable. Would you consider eliminating the variables "verbal" and "math"? Let alpha = .05.(2 分)
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d.根據以上實證結果,GPA的t值4.07是如何計算出來。 (2分)
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