FinalS2_solA99

FinalS2_solA99 - Final Exam No. 1 Solution The correct set...

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Final Exam MSCI3710 No. Solution Version A Version B 1 The correct set of hypothesis for this chi-square test of independence is Ho: The preferred shopping time is independent upon the age range. Ha: The preferred shopping time is dependent upon the age range A E 2 The test statistic can be found at the table ( Calculation of Chi-square ) given. χ 2 = 15.60417 D C 3 Since χ 2 calc ( 15.60417 ) > χ 2 critical ( 9.48773 ), we Reject the null hypothesis. D B 4 df = (# of columns - 1)* (# of rows - 1 ) = 2*2 = 4 B D 5 Since the calculated statistic is larger than the critical value at .005 significance level, we could say that the p-value should be less than .005 . A C 6 Correlation coefficient is always between -1 and 1 . E C 7 Correlation coefficient indicates the direction and strength of the linear relationship between two variables . C A 8 The least squares estimate for the slope of the regression line (Coefficient of the independent variable) = 6.014. B D 9 The coefficient of the independent variable reveals how much the dependent variable will change when one unit of the independent variable changes. Therefore, if one unit of time increases, the length of cable
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This note was uploaded on 03/09/2011 for the course DSCI 3710 taught by Professor Dr.jay during the Spring '08 term at North Texas.

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FinalS2_solA99 - Final Exam No. 1 Solution The correct set...

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