hw 9 # 18 Researchers conducted an experiment to test the effects of alcohol. Errors were...
hw 9 # 18
Researchers conducted an experiment to test the effects of alcohol. Errors were recorded in a test of visual and motor skills for a treatment group of 24 people who drank ethanol and another group of
24 people given a placebo. The errors for the treatment group have a standard deviation of 2.10, and the errors for the placebo group have a standard deviation of 0.72.
Use a 0.05 significance level to test the claim that the treatment group has errors that vary significantly more than the errors of the placebo group. Assume that the two populations are normally distributed.
What are the null and alternative hypotheses?
Now, identify the significance
The P-value is
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hw 9 # 18
Researchers conducted an experiment to test the effects of
alcohol. Errors were...
Researchers conducted an experiment to test the effects of alcohol. The errors were recorded in a...
Researchers conducted an experiment to test the effects of alcohol. The errors were recorded in a test of visual and motor skills for a treatment group of 24 people who drank ethanol and another group of 22 people given a placebo. The errors for the treatment group have a standard deviation of 1.82, and the errors for the placebo group have a standard deviation of 1.53. Use a 0.05 significance level to test the claim that the treatment group has...
I. , 0.6 OF 12 pts 9.4.7-T Question Help 0 Researchers conducted an experiment to test...
I. , 0.6 OF 12 pts 9.4.7-T Question Help 0 Researchers conducted an experiment to test the effects of alcohol. Errors were recorded in a test of visual and motor skills for a treatment group of 22 people who drank ethanol and another group of 22 people given a placebo. The errors for the treatment group have a standard deviation of 240, and the errors for the placebo group have a standard deviation of 0.83. Use a 0.05 significance level...
A. B. 2. Identify the test statistic. (Round to two decimal places as needed.) 3. Use...
A.
B.
2. Identify the test statistic. (Round to two decimal places as
needed.)
3. Use technology to identify the P-value. (Round to three
decimal places as needed.)
4. What is the conclusion for this hypothesis test?
A. Fail to reject H 0. There is insufficient evidence to support
the claim that the treatment group has errors that vary
significantly more than the errors of the placebo group.
B. Reject H 0. There is insufficient evidence to support the claim...
Treatment Sham i Researchers conducted a way to determine whether magnets we effective in treating back...
Treatment Sham i Researchers conducted a way to determine whether magnets we effective in treating back pain. The results are shown in the table for the treatment with magnets group and the shamir 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 we us Complete parts (a) and (b) below. Use a 0.05...
A. Identify the test statistic=_____ (Round to two decimal places) The P-value is=_____ (Round to three...
A.
Identify the test statistic=_____ (Round to two decimal
places)
The P-value is=_____ (Round to three decimal
places)
What is the concluion for this hypothesis
test?
A. Fail to reject Upper H0. There is sufficient evidence to
warrant rejection of the claim that the variation of maximal skull
breadths in 4000 B.C. is the same as the variation in A.D. 150.
B. Reject Upper H 0. There is insufficient evidence to warrant
rejection of the claim that the variation of...
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 0.05 significance level...
Treatment Sham Researchers conducted a study to determine whether magnets are effective in treating back pain. The...
Treatment Sham 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 0.05...
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 distributedpopulations, 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...
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 0.05 significance level...
Treatment Sham Researchers conducted a study to determine whether magnets are effective in treating back pain....
Treatment Sham 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. 17 0.57 x...
I. , 0.6 OF 12 pts 9.4.7-T Question Help 0 Researchers conducted an experiment to test the effects of alcohol. Errors were recorded in a test of visual and motor skills for a treatment group of 22 people who drank ethanol and another group of 22 people given a placebo. The errors for the treatment group have a standard deviation of 240, and the errors for the placebo group have a standard deviation of 0.83. Use a 0.05 significance level...
A.
B.
2. Identify the test statistic. (Round to two decimal places as
needed.)
3. Use technology to identify the P-value. (Round to three
decimal places as needed.)
4. What is the conclusion for this hypothesis test?
A. Fail to reject H 0. There is insufficient evidence to support
the claim that the treatment group has errors that vary
significantly more than the errors of the placebo group.
B. Reject H 0. There is insufficient evidence to support the claim...
Treatment Sham i Researchers conducted a way to determine whether magnets we effective in treating back pain. The results are shown in the table for the treatment with magnets group and the shamir 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 we us Complete parts (a) and (b) below. Use a 0.05...
A.
Identify the test statistic=_____ (Round to two decimal
places)
The P-value is=_____ (Round to three decimal
places)
What is the concluion for this hypothesis
test?
A. Fail to reject Upper H0. There is sufficient evidence to
warrant rejection of the claim that the variation of maximal skull
breadths in 4000 B.C. is the same as the variation in A.D. 150.
B. Reject Upper H 0. There is insufficient evidence to warrant
rejection of the claim that the variation of...
Treatment Sham 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 0.05...
Treatment Sham 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. 17 0.57 x...
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