question archive Assuming the population variances are known, the variance of thedistribution of differences between twoindependent population means is ________
Assuming the population variances are known, the variance of thedistribution of differences between twoindependent population means is ________
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Assuming the population variances are known, the variance of thedistribution of differences between twoindependent population means is ________.
| the sum of the two sample sizes for each population | ||
| the sum of the two variances of the two sampling distributions | ||
| the sum of the two means | ||
| the sum of the two standarddeviations of the two sampling distributions |
2. Consider a two-tailed test with a level of confidence of 81.70%. The z-value is _______.
| 2.00 | ||
| 0.89 | ||
| 2.66 | ||
| 1.33 |
