Suppose a mutual fund qualifies as having moderate risk if the standard deviation of its monthly rate of return is less than 6%. A mutual-fund rating agency randomly selects 25 months and determines the rate of return for a certain fund. The standard deviation of the rate of return is computed to be 5.61%. Is there sufficient evidence to conclude that the fund has moderate risk at the α = 0.10 level of significance? A normal probability plot indicates that the monthly rates of return are normally distributed.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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I need null hypothesis, alternative hypothsis, then X2, p-value

Suppose a mutual fund qualifies as having moderate risk if the standard deviation of its
monthly rate of return is less than 6%. A mutual-fund rating agency randomly selects 25
months and determines the rate of return for a certain fund. The standard deviation of the
rate of return is computed to be 5.61%. Is there sufficient evidence to conclude that the fund
has moderate risk at the α = 0.10 level of significance? A normal probability plot indicates
that the monthly rates of return are normally distributed.
Transcribed Image Text:Suppose a mutual fund qualifies as having moderate risk if the standard deviation of its monthly rate of return is less than 6%. A mutual-fund rating agency randomly selects 25 months and determines the rate of return for a certain fund. The standard deviation of the rate of return is computed to be 5.61%. Is there sufficient evidence to conclude that the fund has moderate risk at the α = 0.10 level of significance? A normal probability plot indicates that the monthly rates of return are normally distributed.
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