You are interested in the difference between two population means. When is it ap

Question

You are interested in the difference between two population means. When is it appropriate to conduct a hypothesis test using the test statistic t - (R1 R2) s12/ns22/n2]? Check all that apply. The population variances 12 and 22 are unknown, the data are generated from a matched pairs experiment, and the population of differences are normally distributed The populations are both normally distributed, the population variances 12 and 22 are unknown and unequal, and the data are generated from an independent samples experiment. The population variances 21 and 22 are unknown and unequal, the data are generated from an independent samples experiment, and both samples satisfy the large sample requirement The population variances 12 and 22 are known, the data are generated from an independent samples experiment, and both populations are normally distributed. You want to compare the two population variances 12 and 22. When is it appropriate to conduct a hypothesis test using the test statistic F = s12/s22? Check all that apply. The population variances 12 and 22 are unknown, the samples are not independent, and the populations are not normally distributed The population variances 12 and 22 are known, and you independently sample from two normal populations. The population variances 12 and 22 are unknown, and you independently sample from two normal populations. The population variances 12 and 22 are unknown, and you independently sample from two nonnormal populations. You are interested in comparing two populations whose data are measured on a nominal scale. Your null hypothesis is that the population parameters are equal. Both samples are large. What is the appropriate test statistic? O z = (P1-P2) / V[p(1-p)(1/n1 + 1/n2)]

Explanation / Answer

Ans:

1)

Populations are normally distributed,populations variances are unknown and unequal and data is generated from indpendent samples experiments.

(second option is correct)

2)

The population variances are unknown and indeendently sample from two normal populations.

(third option is correct)

3)

it will be two proportion z test

(first option is correct)

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