Which one of the following DOES NOT illustrate two related samples? a. identical

Question

Which one of the following DOES NOT illustrate two related samples? a. identical twins are split into two groups b. schoolchildren are measured before and after the school term c. marital couples are split into two groups d. college freshmen are split into two groups ***I know for sure the answer IS NOT B

Statistical significance indicates that the null hypothesis is a. false b. mildly false because of a small effect c. seriously false because of a large effect d. probably false ***I know for sure the answer IS NOT A

The null hypothesis presumes that any observed difference between sample means a. is a common outcome b. reflects an effect c. is due to variability d. occurs rarely ***I know for sure the answer IS NOT D

To determine whether it qualifies as a common or rare outcome under the null hypothesis, the one observed difference between sample means is viewed as originating from the a. two sample b. two underlying populations c. sampling distribution for the sample mean d. sampling distribution for the differences between sample means ***I know for sure the answer IS NOT B   

Explanation / Answer

Which one of the following DOES NOT illustrate two related samples? a. identical twins are split into two groups b. schoolchildren are measured before and after the school term c. marital couples are split into two groups d. college freshmen are split into two groups ***I know for sure the answer IS NOT B

The answer is d as dividing the college freshmen into two groups need not have any relation unlike the identical twins and marital couples.

Statistical significance indicates that the null hypothesis is a. false b. mildly false because of a small effect c. seriously false because of a large effect d. probably false ***I know for sure the answer IS NOT A

The correctt answer is d as statistical significance of the null hypothesis is probably false.

The null hypothesis presumes that any observed difference between sample means a. is a common outcome b. reflects an effect c. is due to variability d. occurs rarely ***I know for sure the answer IS NOT D

The correct answer is the option c, that is the null hypothesis generally says that the difference is null and hence the difference is only because of natural variability.

To determine whether it qualifies as a common or rare outcome under the null hypothesis, the one observed difference between sample means is viewed as originating from the a. two sample b. two underlying populations c. sampling distribution for the sample mean d. sampling distribution for the differences between sample means ***I know for sure the answer IS NOT B

The correct answer is option c since if the means is common, then the difference would be because of the sampling distribution for the sample mean.

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