At a Significance Level of

Question

Examlex · Accepted Answer

The Answer is Fail to reject H₀,normal distribution

\begin{array} { l } \chi ^ { 2 } = \frac { ( 12 - 14.56 ) ^ { 2 } } { 14.56 } + \frac { ( 18 - 20.365 ) ^ { 2 } } { 20.365 } + \frac { ( 15 - 12.28 ) ^ { 2 } } { 12.28 } + \frac { ( 5 - 2.795 ) ^ { 2 } } { 2.795 } = 3.07 \\chi _ { .05,1 } ^ { 2 } = 3.84\end{array}

3.07 < 3.84

, failed to reject

\mathrm { H } _ { 0 }

, normal distribution is appropriate.

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