i sixsigma
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For the given claim, complete parts (a) and (b) below.
Claim: High school teachers have incomes with a standard deviation that is more than $20,250. A recent study of 130 high school teacher incomes showed a standard deviation of $23,250.
a. Express the original claim in symbolic form.
sigma > 420,250.
b. identify the null and the alternative hypotheses that should be used to arrive at a conclusion that supports the claim.
H0: sigma = $20,250
H1: sigma > 420,250
