A researcher develops a new drug to treat stress but she isn't sure what kind of effect it will have on people. In order to investigate the effects, one sample of n=9 people receives the drug, and a different sample of n=9 receives a placebo. After treatment, the drug group reports a mean stress level of M = 41 with SS = 95. The control group reports a mean stress level of M = 42 with SS = 110. Using a two-tailed hypothesis test with a = .05, which of the following lists the correct %3D test statistic value as well as conclusion? O t = 1.69 t = 12.81 O t= -0.59 O t = 0.59
A researcher develops a new drug to treat stress but she isn't sure what kind of effect it will have on people. In order to investigate the effects, one sample of n=9 people receives the drug, and a different sample of n=9 receives a placebo. After treatment, the drug group reports a mean stress level of M = 41 with SS = 95. The control group reports a mean stress level of M = 42 with SS = 110. Using a two-tailed hypothesis test with a = .05, which of the following lists the correct %3D test statistic value as well as conclusion? O t = 1.69 t = 12.81 O t= -0.59 O t = 0.59
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Question
![A researcher develops a new drug to treat stress but she isn't sure what kind of effect
it will have on people. In order to investigate the effects, one sample of n=9 people
receives the drug, and a different sample of n=9 receives a placebo. After treatment,
the drug group reports a mean stress level of M = 41 with SS = 95. The control group
reports a mean stress level of M = 42 with SS = 110.
Using a two-tailed hypothesis test with a = .05, which of the following lists the correct
test statistic value as well as conclusion?
O t = 1.69
t = 12.81
t = -0.59
O t = 0.59](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2229af9a-d13d-4363-b49c-26c001bbacba%2F11dcf7f3-8795-4e09-b024-c03db9d2e6ee%2Fx641ssq_processed.png&w=3840&q=75)
Transcribed Image Text:A researcher develops a new drug to treat stress but she isn't sure what kind of effect
it will have on people. In order to investigate the effects, one sample of n=9 people
receives the drug, and a different sample of n=9 receives a placebo. After treatment,
the drug group reports a mean stress level of M = 41 with SS = 95. The control group
reports a mean stress level of M = 42 with SS = 110.
Using a two-tailed hypothesis test with a = .05, which of the following lists the correct
test statistic value as well as conclusion?
O t = 1.69
t = 12.81
t = -0.59
O t = 0.59
![A researcher hypothesizes that the general population has a mean of u = 50 on some
%3D
variable of interest. To test this hypothesis, the researcher collects data from a sample
of n = 16 participants. The sample mean is then calculated to be M = 55 with sample
standard deviation of s = 3.
Using a two-tailed hypothesis test with a = .05, which of the following lists the correct
test statistic value as well as conclusion?
O t= 6.67; Fail to Reject Ho
O t = 6.67; Reject Ho
z = 6.67; Fail to Reject Ho
O z = 6.67; Reject Ho](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2229af9a-d13d-4363-b49c-26c001bbacba%2F11dcf7f3-8795-4e09-b024-c03db9d2e6ee%2F0oe013w_processed.png&w=3840&q=75)
Transcribed Image Text:A researcher hypothesizes that the general population has a mean of u = 50 on some
%3D
variable of interest. To test this hypothesis, the researcher collects data from a sample
of n = 16 participants. The sample mean is then calculated to be M = 55 with sample
standard deviation of s = 3.
Using a two-tailed hypothesis test with a = .05, which of the following lists the correct
test statistic value as well as conclusion?
O t= 6.67; Fail to Reject Ho
O t = 6.67; Reject Ho
z = 6.67; Fail to Reject Ho
O z = 6.67; Reject Ho
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