Question 16 0 / 1 point Compared to the standard error for two independent sampl

Question

Question 16

0 / 1 point

Compared to the standard error for two independent samples, that for two related samples will tend to be

Question options:

smaller.

the same.

approximately the same.

large.

Question 17

0 / 1 point

Once pairs of observations have been converted to difference scores, the t test for two related samples can be viewed as a

Question options:

z test for a single sample.    

t test for a single sample.    

t test for two independent samples.

t test for a population correlation coefficient.

Question 18

0 / 1 point

When subjects perform double duty in both conditions of an experiment, the order in which conditions are experienced should be

Question options:

counterbalanced.

controlled.

randomized.

held constant.

Question 19

0 / 1 point

The t test for two related samples should be used if

Question options:

subjects are matched.

subjects are measured twice.

either a or b

sample sizes are equal.

Question 20

0 / 1 point

The dream times were measured for each of twenty volunteers during two sleep periods: once after an evening when no alcohol was consumed and once after an evening when alcohol was consumed.

To analyze the test results, use a t test for two related samples because

Question options:

subjects are all young adults.                   

equal numbers of subjects participate in both periods.

the same subject is measured twice.           

each subject is monitored for rapid eye movement.

Question 21

0 / 1 point

The dream times for each of twenty volunteers are measured during two sleep periods: once after an evening when no alcohol was consumed and once after an evening when alcohol was consumed. It would be appropriate to test the null hypothesis with a

Question options:

twotailed test at the .05 level of significance.

onetailed test, lower tail critical, at the .05 level of significance.

onetailed test, upper tail critical, at the .05 level of significance.

either a one or twotailed test, but at the .001 level of significance.

Question 22

0 / 1 point

The dream times for each of twenty volunteers are measured during two sleep periods: once after an evening when no alcohol was consumed and once after an evening when alcohol was consumed. It would be most important that subjects experience the two conditions in

Question options:

the same order and on consecutive nights (before any alcohol effect disappears).

the same order and on nonconsecutive nights (after any alcohol effect disappears).

counterbalanced order and on consecutive nights (before any alcohol effect disappears).

counterbalanced order and on nonconsecutive nights (after any alcohol effect disappears).

Question 24

0 / 1 point

Grade-school children are randomly assigned to reading groups of either four or eight children throughout the school year. At the end of the school term, scores are obtained for each child on a standardized reading achievement test. The appropriate test (to evaluate any difference between reading group size) would be a

Question options:

t test for one sample.

t test for two independent samples.

t test for two related samples.

none of the above

Question 25

0 / 1 point

If a sample correlation coefficient qualifies as a rare outcome under the null hypothesis, then you can conclude that the

Question options:

sample correlation coefficient differs from zero.

sample correlation coefficient could be zero.

population correlation coefficient could be zero.

population correlation coefficient differs from zero.

Question 16

0 / 1 point

Explanation / Answer

25. Here independent group assumption (where students were assigned to reading groups of either 4 or 8 children) is followed, independence assumption (this is an experiment and randomization only obeys the assumption) is also followed. This accounts for 2-sample t test, where mean scores of children in each group is compared to the other to find differences between reading group size.

26. In this context, conclude that rxy is not equal to zero. Sample correlation coefficient differs from zero.

24. Counter balanced order and on non consecutive nights. Counter balancing eradicates the chances of order of the treatments and non-consecutive nights are important because, it removes influence of other factors in repeated measure design.

22. The null hypothesis is H0: mudream without alcohol=mudream with alcohol at 0.05 level of significance to reduce th echance of Type I error. Two-tailed with alpha=0.05.

21. Since, same 20 volunteers are measured twice (dream before alcohol and after alcohol) use paired 2-sample t test.

20. When paired data are collected (matched), followed by other assumptions being met, the t test for related sample is used.

19. Counter balancing i sdone to remove any order effect in the experiment. Therefore, in thi scontext, use counterbalancing.

Related Questions

Navigate

• Browse (All)
• Browse Q
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.