Statistics: Concepts and Controversies
Statistics: Concepts and Controversies
9th Edition
ISBN: 9781464192937
Author: David S. Moore, William I. Notz
Publisher: W. H. Freeman
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Chapter 23, Problem 1CS
To determine

To explain: Whether it is reasonable to ask this chosen fund was above the average.

Expert Solution & Answer
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Answer to Problem 1CS

Solution: It is reasonable to ask whether the chosen fund was above the average or not.

Explanation of Solution

There were more than 10,000 mutual funds among which ProFunds Internet Inv Fund was in the top 1%. The past data indicates that the ProFunds Internet Inv Fund provided positive returns. The return of the funds can be positive, negative, or zero. As the fund provides positive return, it is reasonable to conclude that the chosen fund was above the average.

To explain: The expected outcome for the significance test.

Solution: The expected outcome of the significant test can be described as the performance of the chosen fund is better than the average performance of all funds.

Explanation: To compare the performance of the funds with the average performance of all the funds, the significance test is performed. The result that can be expected from the test is that the performance of the chosen fund is better than the average performance of all funds. That is, the result of the test is significant.

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