Here is not sufficient evidence to support the claim BFail to reject Ho: There i

Question

Here is not sufficient evidence to support the claim BFail to reject Ho: There is not sufficient evidence to reject the claim 16. A sports analyst claims that the mean batting mean batting average for teams in the National League The data listed below are random, an population variances are equal average for teams in the American League is not equal to the because a pitcher does not bat in the American League d independent. At a·aos, test the sports analysts claim. Assame the American League .279 0.274 0.271 0.268 0284 0.267 0.266 0.263 0.265 0.254 0.240 National League 0.261 0.259 0.256 A) Cannot use Z or T test. B) Standardized test statistic -0.167: critical value to 12.179, fail to reject Ho: There is not sufficient evidence to support the claim. 17. Given the supply of a commodity, x, and the price of a commodity, y, would you expect a positive correlation, a B) negative correlation negative correlation, or no correlation? A) no correlation C) positive correlation 18. A multiple regression equation is y·-35 000 + 130 1 + 20 00x2 where x1 is a person's age, x2 is the person's grade point average in college, and y is the person's income. Predict the income for a person who is 28 years oled and had a college grade point average of 3.1. C) $100,640 D) A) 165,640 B) 8525,403 manager's sales representatives travel per month and the amount of sales (in thousands of dollars) per month Calculate the correlation coefficient, r. 19. A manager wishes to determine the relationship between the number of miles (in hundreds of miles) the Miles traveled, x 14 15 112 19 |10 | 17 | 5 13|13 71586 130 C) 0.791 D) 0.717 A) 0.561 B) 0.632 ds were kept on the relationship between the rainfall (in inches) and the yield of relationship between t 20. In an area of the Midwest, records wheat (bushels per acre). Test the significance of the correlation coefficient using . 0.01 and the claime 9 5.7 14.31 14.7 9.2 7.5| 12.111.211751 Rainfall (in inches), x Yield (bushels per acre),y T545 62.8 A) There is sufficient evidence to conclude that a significant correlation exists B) There is not sufficient evidence to conclude that a significant correlation exists

Explanation / Answer

17) Positive correlation

18) y hat = -35000 + 130*28 + 20000*3.1 = 30640

19) 0.632 ( using excel function = correl)

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