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. 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 the p-value? What is the conclusion? |
Homework Answers
Answer #1
Not the answer you're looking for?
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
μ
μ 1
μ 2
n
26
30
x̅
2.34
2.61
s
0.96
0.66
Test the claim that the...
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. 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...
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. Use a 0.05significance level for both...
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
distributedpopulations, 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...
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...
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 320 children treated with the herb, the
mean number of days with fever was 0.81 with a standard deviation
of 1.42 days. Among 372 children given a placebo, the mean number
of days with fever was 0.62 with a standard deviation of 1.15 days.
Use a 0.05 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...
ADVERTISEMENT
Need Online Homework Help?
Get Answers For Free
Most questions answered within 1 hours.
ADVERTISEMENT
Active Questions
asked 5 minutes ago
asked 40 minutes ago
asked 43 minutes ago
asked 50 minutes ago
asked 57 minutes ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 2 hours ago
asked 2 hours ago
asked 2 hours ago