A researcher is interested in the effect of a drug on sy tolic blood pressure. In arandom sample of N = 28 patients, she randomly divides she measures the bloodpressure of each patient before and 45 minutes after taking the drug. The mean andstandard deviation for the difference in blood pressure for the sample was found to beMdiff = -9.3, sdiff = 12. 7. Which of the following is true for an NHSTapproach with a =.01 to this research question?Op = .006; there is insufficient evidence to reject the null hypothesis, there may ormay not be an effectOp= .0006; there is sufficient evidence to reject the null hypothesis and concludethere is an effectOp= .006; there is sufficient evidence to accept the null hypothesis and concludethat there is no effectOp= .0006; there is insufficient evidence to reject the null hypothesis, there may ormay not be an effect

We have given that Sample size n =28 Mean difference Mdiff= -9.3 standard deviation difference…

Answered: A researcher is interested in the…

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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A researcher wanted to know whether losing one night sleep can affect problem solving. A sample of n = 25 college students was given a problem-solving task at noon on one day and again at noon on the following day. The students were not permitted any sleep between the two tests. For each student, the difference between the first and the second score was recorded: MD = 5 and standard deviation of the difference score was s = 10. Do the data indicate a significant change in problem solving ability? Use a two-tailed test with α = .01. The alternative hypothesis in words is Group of answer choices Problem solving ability improves after losing on night sleep Problem solving ability is reduced after losing one night of sleep There is no significant difference in problem solving ability between the two conditions: before and after losing one night of sleep There is a significant difference in problem solving ability between the two conditions: before and after losing one night of…
In a large section of a statistics class, the points for the final exam are normally distributed, with a mean of 71and a standard deviation of 8. Grades are assigned such that the top 10% receive A's, the next 20% received B's, the middle 40% receive C's, the next 20% receive D's, and the bottom 10% receive F's. Find the lowest score on the final exam that would qualify a student for an A, a B, a C, and a D.

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