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Given critical z values of ±1.96 and an observed z value of -2.40, the appropriate decision...

Given critical z values of ±1.96 and an observed z value of -2.40, the appropriate decision is to:

a.

neither retain nor reject, but conduct another investigation
b.

neither retain nor reject, but increase the size of the sample
c.

retain the null hypothesis
d.

reject the null hypothesis
math   Statistics-And-Probability   
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Answer #1

Correct option "D"

reject the null hypothesis

(Z - Observed value (-2.40) is less than Z - Critical value (- 1.96) so, we reject he null hypothesis)

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