Question 287742: An elementary school claims that the standard deviation in reading scores of its fourth grade students is less than 3.15. Determine whether the hypothesis test for this claim is left-tailed, right-tailed, or two-tailed.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! An elementary school claims that the standard deviation in reading scores of its fourth grade students is less than 3.15. Determine whether the hypothesis test for this claim is left-tailed, right-tailed, or two-tailed.
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Ho: u >= 3.15
Ha: u < 3.15 (claim)
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Since Ha is "less than" it is a left-tail test.
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Cheers,
Stan H.
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