The Principal of a Middle School Claims That Test Scores $\sigma = 14.7$

Multiple Choice

The principal of a middle school claims that test scores of the seventh-graders at her school vary less than the test scores of seventh-graders at a neighboring school, which have variation described by $\sigma = 14.7$

A) $\mathrm { H } _ { 0 } : \sigma = 14.7$
$\mathrm { H } _ { 1 } : \sigma < 14.7$

B) $\mathrm { H } _ { 0 } : \sigma > 14.7$
$\mathrm { H } _ { 1 } : \sigma \leq 14.7$

C) $H _ { 0 } : \sigma < 14.7$
$\mathrm { H } _ { 1 } : \sigma > 14.7$

D) $\mathrm { H } _ { 0 : \sigma } = 14.7$
$\mathrm { H } _ { 1 } : \sigma > 14.7$