Mathematics, 24.02.2020 19:00, janessa0804
An investor with a stock portfolio worth several hundred thousand dollars sued his broker and brokerage firm because he felt that lack of diversification in his portfolio led to poor performance for many years in a row. In an effort to avoid close public scrutiny, the firm agreed to settle the conflict by an arbitration panel. The arbitration panel compared a sample of 39 months of the investor's returns with the average of the Standard & Poor's 500-stock index for the same period in order to determine whether there was a substantial decrease. Historically, the S&P has a mean return of 0.95. Suppose that you are a member of this arbitration panel. Conduct a hypothesis test to determine if the investor's portfolio performed significantly worse than the performance of the S&P 500. Use a level of significance of alpha=0.05 . Open the data file Rates of Return. Use this information to answer questions 1 through 5.
1. Give a 95% confidence interval for the true mean return of the investor's portfolio. Round your answer accurate to three decimal places in interval notation. Be sure to put the lower bound in the first box and the upper bound in the second.
Is the alternative hypothesis for this test one-tailed or two-tailed?
One-tailed
Two-tailed
What is the t-score for this test? Give your answer accurate to three decimal places. (Example: -3.234)
What is the P-value for this test? Give your answer accurate to three decimal places. (Example: 0.034)
Based on the results of this test, is there enough evidence to say that the investor's portfolio performed significantly worse than the S&P 500?
Yes, because we rejected the null.
Yes, because we failed to reject the null.
No, because we rejected the null.
No, because we failed to reject the null.
Answers: 3
Mathematics, 21.06.2019 16:10, rajene9302
On new year's day, the average temperature of a city is 5.7 degrees celsius. but for new year's day 2012, the temperature was 9.8 degrees below the average. i) if a represents the average temperature on new year's day and 7 represents the temperature on new year's day 2012, what formula accurately relates the two values together? ii) what was the temperature on new year's day 2012? dt a 0.8 ii) - 4 1 degrees celsius da-t-98 ii) 59 degrees celsius 1) 7 = -9,8 11) 59 degrees celsius ii) l degrees celsius
Answers: 2
Mathematics, 21.06.2019 17:00, joelpimentel
Asailor is looking at a kite. if he is looking at the kite at an angle of elevation of 36and the distance from the boat to the point where the kite is directly overhead is 40 feet, how high is the kite?
Answers: 3
Mathematics, 21.06.2019 18:00, cgonzalez1371
Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50. write an inequality to determine the number of chores, c, janie could do to have enough money to buy the cd.
Answers: 2
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