Question

Please specify A B C or D

Express the null hypothesis and the alternative hypothesis in symbolic form. The principal of SELECT ALL APPLICABLE CHOICES A) B) 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 σ-14.7 Ho : σ〉14.7 Ho : σ < 14.7 H1: σ<14.7 H1 : σ> 14.7 C) D) Ho: σ>14.7 Ho: σ<14.7 H1 : σ 14.7 H1 : σ>14.7

Answer 1

The principal claims that test scores of seventh -grader at her school vary less than the test scores of seventh- graders at a neighbouring school , so it is alternative hypothesis

H_{​​​​​​1}:  $\sigma$ < 14.7

So null hypothesis should be H_{​​​​​​0}​​​​​ :  $\sigma$$\geq$ 14.7

Option A) is correct answer