DSCI3710E1_Key

# DSCI3710E1_Key - COURSE DSCI 3710 Exam 1 5W2 2013 Print...

• Test Prep
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Use the following paragraph for the next six questions. The market researchers at Jenn’s restaurant are interested in the proportion of male customers and female customers that would be willing to try a new salad. Random samples of 189 males and 138 females were randomly selected. Responses were recorded as Yes (i.e. interested) or No (i.e. not interested) and are listed as variables MalesInterested (1) and FemalesInterested (2). The samples indicated that 73 males and 92 females respectively were interested in trying a new salad. Test that the proportion of male customers interested is less than the proportion of female customers interested. Use a significance level of α= 0.05 for the test. The KPK Macro output is shown below. Z Test for Two Proportions Variable 1 Variable 2 Sample Proportion 0.386 0.666 Number of Observations 189 138 Ho:XXXX Ha:XXXX Z* -5.009 P[ Z Z*] 0.000 Z Critical, = 0.05 XXXX 1. What is the null hypothesis for the test? A. H o : p1 > p2 B. H o : p1 ≠ p2 C. H o : p1 ≥ p2* D. H o : p1 < p2 E. H o : p1 = p2 2. What is the point estimate of the proportion of females interested in trying a new salad? A. 0.386 B. 0.482 C. 0.289 D. 0.666* E. 0.025 3. What is the critical (table) value of the test statistic?
4. What is the calculated value of the test statistic?

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• Spring '08
• Dr.Jay
• Statistics, Statistical hypothesis testing, significance level, B. Reject Ho

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