A) What is the t-statistic for the sample mean difference?B) How many degrees of freedom are there for this test? df = C) A researcher conducts an independent samples study comparing two treatments and reports the t-stat as t(53) = 3.514. How many people in total participated in this study? An investigator theorizes that people who participate in regular exercise willhave levels of systolic blood pressure that are significantly different, higheror lower, from that of people who do not participate in regular exercise.To test this idea, the investigator randomly assigns 21 subjects to anexercise program for 10 weeks and another 21 subjects to a non-exercisecomparison group. After ten weeks, the mean systolic blood pressure of thesubjects in the exercise group is M₁ = 127 and the standard deviation is s₁ =10. In the non-exercise group, the mean is M₂ = 137 and the standarddeviation is s2 = 9.0. Please test the investigator's theory using an alpha levelof 0.05, two tailed.

From the given information we conduct hypothesis test.

What is the t-statistic for the sample mean difference? B) How many degrees of freedom are there for this test? df = C) A researcher conducts an independent samples study comparing two treatments and reports the t-stat as t(53) = 3.514. How many people in total participated in this study?

What is the t-statistic for the sample mean difference? B) How many degrees of freedom are there for this test? df = C) A researcher conducts an independent samples study comparing two treatments and reports the t-stat as t(53) = 3.514. How many people in total participated in this study?

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) What is the t-statistic for the sample mean difference?

B) How many degrees of freedom are there for this test? df =

C) A researcher conducts an independent samples study comparing two treatments and reports the t-stat as t(53) = 3.514. How many people in total participated in this study?

An investigator theorizes that people who participate in regular exercise will
have levels of systolic blood pressure that are significantly different, higher
or lower, from that of people who do not participate in regular exercise.
To test this idea, the investigator randomly assigns 21 subjects to an
exercise program for 10 weeks and another 21 subjects to a non-exercise
comparison group. After ten weeks, the mean systolic blood pressure of the
subjects in the exercise group is M₁ = 127 and the standard deviation is s₁ =
10. In the non-exercise group, the mean is M₂ = 137 and the standard
deviation is s2 = 9.0. Please test the investigator's theory using an alpha level
of 0.05, two tailed.

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