Question

A study was done using a treatment group and a placebo group. The results are shown...

A study was done using a treatment group and a placebo group. The results are shown in the table. Assume that the two samples are independent simple random samples selected from normally distributed​ populations, and do not assume that the population standard deviations are equal. Complete parts​ (a) and​ (b) below. Use a 0.05 significance level for both parts.

Treatment

Placebo

μ

μ 1

μ 2

n

26

30

x̅

2.34

2.61

s

0.96

0.66
  1. Test the claim that the two samples are from populations with the same mean.

A. What are the null and alternative​ hypotheses?

  1. The test​ statistic, t is
  2. The​ P-value is
  3. State the conclusion for the test.
  4. Construct a confidence interval suitable for testing the claim that the two samples are from populations with the same mean.
Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A study was done using a treatment group and a placebo group. The results are shown...
A study was done using a treatment group and a placebo group. The results are shown in the table. Assume that the two samples are independent simple random samples selected from normally distributed​ populations, and do not assume that the population standard deviations are equal. Complete parts​ (a) and​ (b) below. Use a 0.05 significance level for both parts. Treatment Placebo u u1 u2 n 34 30 x 2.34 2.62 s 0.58 0.95 1. The test statistic is _____ (round...
A study was done using a treatment group and a placebo group. The results are shown...
A study was done using a treatment group and a placebo group. The results are shown in the table. Assume that the two samples are independent simple random samples selected from normally distributed​ populations, and do not assume that the population standard deviations are equal. Complete parts​ (a) and​ (b) below. Use a 0.10 significance level for both parts. Treatment Placebo mu mu 1 mu 2 n 29 40 x overbar 2.34 2.69 s 0.82 0.52 a. Test the claim...
A study was done using a treatment group and a placebo group. The results are shown...
A study was done using a treatment group and a placebo group. The results are shown in the table. Assume that the two samples are independent simple random samples selected from normally distributed? populations, and do not assume that the population standard deviations are equal. Complete parts? (a) and? (b) below. Use a 0.01 significance level for both parts. treatment, u1, n=25, x=2.35, s=.52 Placebo, u2, n=39, x=2.68, s=.92 Test statistic, t, is= P value= ?<u1-u2<? Reject?
A study was done using a treatment group and a placebo group. The results are shown...
A study was done using a treatment group and a placebo group. The results are shown in the table. Assume that the two samples are independent simple random samples selected from normally distributed​ populations, and do not assume that the population standard deviations are equal. Use a 0.01 significance level. Treatment Placebo Mean Mean 1 Mean 2 N 31 36 X 2.38 2.66 S 0.88 0.57 What are the null and alternative hypothesis? What is the test statistic? What is...
A study was done on proctored and nonproctored tests. The results are shown in the table....
A study was done on proctored and nonproctored tests. The results are shown in the table. Assume that the two samples are independent simple random samples selected from normally distributed​populations, and do not assume that the population standard deviations are equal. Use a 0.05 significance level for both parts. Proctored: n = 33, x bar = 77.98, s = 10.44 Nonproctored: n = 31, x bar = 81.95, s = 20.69 a. The test​ statistic, t, is ___?   ​(Round to...
3. A study done on body temperatures of men and women. The results are shown below:...
3. A study done on body temperatures of men and women. The results are shown below: Assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. Use a 0.05 significance level To test the claim that men have a higher mean body temperature than women. μ1 n1 = 11 X1 = 97.57 S1 = 0.78 degree F degree F μ2 n2 = 59 X2...
Claim: The treatment and placebo groups have the same mean. Treatment Group: sample size = 5,...
Claim: The treatment and placebo groups have the same mean. Treatment Group: sample size = 5, mean = 98.20, standard deviation = 0.62 Placebo Group: sample size = 25, mean = 104.60, standard deviation = 0.61 a) Assume equal variances to test this claim. Use a 0.05 level of significance. b)Assume unequal variances to test this claim. Use a 0.05 level of significance.
Researchers conducted a study to determine whether magnets are effective in treating back pain. The results...
Researchers conducted a study to determine whether magnets are effective in treating back pain. The results are shown in the table for the treatment​ (with magnets) group and the sham​ (or placebo) group. The results are a measure of reduction in back pain. Assume that the two samples are independent simple random samples selected from normally distributed​ populations, and do not assume that the population standard deviations are equal. Complete parts​ (a) and​ (b) below. treatment sham m m1 m2...
A study was done on prot and non-pro tests. The results are shown in the table....
A study was done on prot and non-pro tests. The results are shown in the table. Assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. Complete parts (a) and (b) below. Use a significance level 0.01 for both parts. ___________________________________________________________________ Pro Non-pro    μ    μ1    μ2 n 34    32   x    74.86    83.25 s    10.51    18.27 _______________________________________________...
In a randomized​ double-blind, placebo-controlled trial of​ children, an herb was tested as a treatment for...
In a randomized​ double-blind, placebo-controlled trial of​ children, an herb was tested as a treatment for upper respiratory infections in children.​ "Days of​ fever" was one criterion used to measure effects. Among 309 children treated with the​ herb, the mean number of days with fever was 0.91​, with a standard deviation of 1.54 days. Among 370 children given a​ placebo, the mean number of days with fever was 0.73 with a standard deviation of 1.24 days. Use a 0.01 significance...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT