Dr. Snooze looked at the effect of sleep deprivation on cognitive functioning in

Question

Dr. Snooze looked at the effect of sleep deprivation on cognitive functioning in elderly men and women. He contacted local doctors specializing in geriatrics to obtain a sample for the study. On Monday morning at 8am after 8 hours of sleep the night before and then again a week later at 8am after 4 hours of sleep the night before, 35 subjects solved a complicated maze when they arrived at the lab in the morning and the time to complete the maze was recorded for each subject.

1. A Type 1 error in this study would be:

a.       Supporting the research hypothesis when it is true

b.       Conclude a difference in males and females and there really is a difference

c.       Fail to support the research hypothesis when a difference in completion time does not really exist

d.       Conclude completion times differ, but the null is really true

e.       Accept the null when the null in reality is false

f.        Fail to accept the research hypothesis that completion times differ when they really don’t

2. The most serious violation of statistical assumptions for the above study would be if the researcher:

a.       did not use independent observations

b.       used equal N

c.       had variances that were too large

d.       had more males than females

e.       the populations were not normally distributed

f.        all of the above are relevant violations

Explanation / Answer

Solution

Here the null hypothesis will be : maze completion time is same

Alternate hypothesis : maze completion time differs

(a) Type 1 error is rejecting a true hypothesis so,

option (d) Conclude completion times differ, but the null is really true

(b) option (f)  all of the above are relevant violations

Related Questions

Navigate

• Browse (All)
• Browse D
• Subjects

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