1. A researcher is studying the effect a new drug into on blood pressure. The researcher measures the blood pressure of 30 participants before and after they take the drug and calculates the mean difference in blood pressure to be -5 mm Hg. The standard deviation of the differences is 8 mm Hg. (a) Using p-test, determine if the change in blood pressure is statistically significant. (b) The researcher has determined that the sample standard deviation cannot be assumed as σ, perform the same test but now using a t-test.
1. A researcher is studying the effect a new drug into on blood pressure. The researcher measures the blood pressure of 30 participants before and after they take the drug and calculates the mean difference in blood pressure to be -5 mm Hg. The standard deviation of the differences is 8 mm Hg. (a) Using p-test, determine if the change in blood pressure is statistically significant. (b) The researcher has determined that the sample standard deviation cannot be assumed as σ, perform the same test but now using a t-test.
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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![1. A researcher is studying the effect a new drug into on blood pressure. The researcher measures
the blood pressure of 30 participants before and after they take the drug and calculates the mean
difference in blood pressure to be -5 mm Hg. The standard deviation of the differences is 8 mm
Hg.
(a) Using p-test, determine if the change in blood pressure is statistically significant.
(b) The researcher has determined that the sample standard deviation cannot be assumed as σ,
perform the same test but now using a t-test.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa7a76b5f-08bf-4888-972e-6a9274878fcd%2F639c7158-13dc-4eb5-932d-95704d338c5a%2Fg6kmptv_processed.png&w=3840&q=75)
Transcribed Image Text:1. A researcher is studying the effect a new drug into on blood pressure. The researcher measures
the blood pressure of 30 participants before and after they take the drug and calculates the mean
difference in blood pressure to be -5 mm Hg. The standard deviation of the differences is 8 mm
Hg.
(a) Using p-test, determine if the change in blood pressure is statistically significant.
(b) The researcher has determined that the sample standard deviation cannot be assumed as σ,
perform the same test but now using a t-test.
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VIEWStep 2: Determine hypotheses
VIEWStep 3: Calculate test statistic
VIEWStep 4: Calculate p-value
VIEWStep 5: Determine decision and conclusion
VIEWStep 6: Perform t-test
VIEWStep 7: Calculate degrees of freedom and p-value.
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