In a two-tail test for the population mean, the null hypothesis will be rejected at the

\alpha

level of significance if the value of the standardised test statistic Z is such that:
A)Z > z $In a two-tail test for the population mean, the null hypothesis will be rejected at the \alpha level of significance if the value of the standardised test statistic Z is such that: A)Z > z . B)Z < -z . C)-z < Z < z . D)|Z| > z .$ .
B)Z < -z $In a two-tail test for the population mean, the null hypothesis will be rejected at the \alpha level of significance if the value of the standardised test statistic Z is such that: A)Z > z . B)Z < -z . C)-z < Z < z . D)|Z| > z .$ .
C)-z $In a two-tail test for the population mean, the null hypothesis will be rejected at the \alpha level of significance if the value of the standardised test statistic Z is such that: A)Z > z . B)Z < -z . C)-z < Z < z . D)|Z| > z .$ < Z < z $In a two-tail test for the population mean, the null hypothesis will be rejected at the \alpha level of significance if the value of the standardised test statistic Z is such that: A)Z > z . B)Z < -z . C)-z < Z < z . D)|Z| > z .$ .
D)|Z| > z $In a two-tail test for the population mean, the null hypothesis will be rejected at the \alpha level of significance if the value of the standardised test statistic Z is such that: A)Z > z . B)Z < -z . C)-z < Z < z . D)|Z| > z .$ .

A Random Sample of 100 Families in a Large City

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