Question 7 of 23 10 10 points an investor wants to

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Question 7 of 23 1.0/ 1.0 Points An investor wants to compare the risks associated with two different stocks. One way to measure the risk of a given stock is to measure the variation in the stock’s daily price changes. In an effort to test the claim that the variance in the daily stock price changes for stock 1 is different from the variance in the daily stock price changes for stock 2, the investor obtains a random sample of 21 daily
price changes for stock 1 and 21 daily price changes for stock 2. The summary statistics associated with these samples are: n 1 = 21, s 1 = .725, n 2 = 21, s 2 = .529. If you compute the test value by placing the larger variance in the numerator, at the .05 level of significance, would you conclude that the risks associated with these two stocks are different?
Part 4 of 16 - 3.0/ 3.0 Points Question 8 of 23 1.0/ 1.0 Points Results from previous studies showed 79% of all high school seniors from a certain city plan to attend college after graduation. A random sample of 200 high school seniors from this city reveals that 162 plan to attend college. Does this indicate that the percentage has increased from that of previous studies? Test at the 5% level of significance. State the null and alternative hypotheses.
Question 9 of 23 1.0/ 1.0 Points The null and alternative hypotheses divide all possibilities into:
Question 10 of 23 1.0/ 1.0 Points Suppose that the mean time for a certain car to go from 0 to 60 miles per hour was 7.7 seconds. Suppose that you want to test the claim that the average time to accelerate from 0 to 60 miles per hour is longer than 7.7 seconds. What would you use for the alternative hypothesis? A.H 1 : 7.7 seconds B.H 1 : = 7.7 seconds C.H 1 : < 7.7 seconds D.H 1 : > 7.7 seconds Answer Key: D
Part 5 of 16 - 1.0/ 2.0 Points
Question 11 of 23 0.0/ 1.0 Points Which of the following will make a confidence interval narrower and more precise?
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