6. An experiment measured the level of CPK in the blood of ten runners and ten cyclists, both before and after exercise. Runners Cyclists Mean St. Dev. Мean St. Dev. Before exercise 255.63 115.58 173.8 90.69 After exercise 284.75 132.64 177.1 64.53 Difference 29.12 21.01 3.3 6.85 a) Test whether there is significant difference between the CPK values of runners and cyclists before exercise at the a = 0.05 level, assuming that the standard deviations are different for these populations. b) Find a 95% confidence interval for the difference of CPK values of runners and cyclists before exercise. c) Test at the a = 0.05 level whether there is a significant increase in the CPK levels of cyclists before and after exercise.

6. An experiment measured the level of CPK in the blood of ten runners and ten cyclists, both before and after exercise. Runners Cyclists Mean St. Dev. Мean St. Dev. Before exercise 255.63 115.58 173.8 90.69 After exercise 284.75 132.64 177.1 64.53 Difference 29.12 21.01 3.3 6.85 a) Test whether there is significant difference between the CPK values of runners and cyclists before exercise at the a = 0.05 level, assuming that the standard deviations are different for these populations. b) Find a 95% confidence interval for the difference of CPK values of runners and cyclists before exercise. c) Test at the a = 0.05 level whether there is a significant increase in the CPK levels of cyclists before and after exercise.

Name: 6. An experiment measured the level of CPK in the blood of ten runner
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Description: 6. An experiment measured the level of CPK in the blood of ten runners and ten cyclists, bothbefore and after exercise.RunnersCyclistsMeanSt. Dev.MeanSt. Dev.Before exercise255.63115.58173.890.69After exercise284.75132.64177.164.53Difference29.1221.

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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Concept explainers

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.

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Question

6. An experiment measured the level of CPK in the blood of ten runners and ten cyclists, both
before and after exercise.
Runners
Cyclists
Mean
St. Dev.
Mean
St. Dev.
Before exercise
255.63
115.58
173.8
90.69
After exercise
284.75
132.64
177.1
64.53
Difference
29.12
21.01
3.3
6.85
a) Test whether there is significant difference between the CPK values of runners and cyclists
before exercise at the a = 0.05 level, assuming that the standard deviations are different for
these populations.
b) Find a 95% confidence interval for the difference of CPK values of runners and cyclists
before exercise.
c) Test at the a = 0.05 level whether there is a significant increase in the CPK levels of
cyclists before and after exercise.

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