Question

n elementary school claims that the standard deviation in reading scores of its fourth grade students is less than 3.35. etermine whether the hypothesis test for this claim is left-tailed, right-tailed, or two-tailed. a. left-tailed b. right-tailed c. two-tailed

Explanation:

A left - tailed test is used when the alternative hypothesis is of the form \(H_1:\sigma<\sigma_0\). Here, the claim is that the standard deviation (\(\sigma\)) in reading scores is less than \(3.35\) (\(\sigma_0 = 3.35\)), so the alternative hypothesis is \(H_1:\sigma<3.35\).

Answer:

A. left - tailed