Question 1157124: In a sample of 100 Republicans, 72 favored the president’s anti - drug program; while in a sample of 150 Democrats, 84 favored his program.
a. Is there a significant difference in the proportions of the Democrats and the Republicans who favored the president’s anti-drug?
b. Estimate the difference at 95% confidence level.
A physician measured pulse rates of 26 college men. Based on the sample, he found that a mean pulse rate is 70 pulse beats per minute with a standard deviation of 9.85 beats per minute. Is the mean pulse rate for all college men is different from the current standard of 72 beats per minute, given that the P.value = 0.132?
- Specify your null and alternative hypotheses.
- Based on P.value approach, Write your decision and conclusion at 95% confidence level.
A study was conducted to investigate the effectiveness of hypnotism in reducing pain. Results of randomly selected patients are shown in the table below. A lower score indicates less pain. Can we conclude that the hypnotism is effective in reducing the pain?
Patient
1
2
3
4
5
6
7
8
Before hypnotism
6.6
6.5
9.0
10.3
11.3
8.1
6.3
11.6
After hypnotism
6.8
2.4
7.4
8.5
8.1
6.1
3.4
2.0
Answer by ikleyn(52798)   (Show Source):
You can put this solution on YOUR website! .
At this forum, there is a RULE, a POLICY and a REQUIREMENT
ONE and ONLY ONE problem per post.
Please DO NOT VIOLATE . . .
Otherwise, you often will find your posts in the TRASH SECTION, partly or totally DESTROYED.
Have a nice day (!)
|
|
|
