The effect of exercise on the amount of lactic acid in the blood was examined. Eight males wereselected at random from those attending a week-long racquetball training camp. Blood lactate levelswere measured before and after playing three games of racquetball. Note the data below:Player12348Before1320171313161516After1817403530203319a) Explain why these are paired data.b) Calculate and interpret the mean difference.c) Researchers would like to estimate the true mean difference (after before) on the amount of lacticacid for the 8 males attending a week-long racquetball training camp. Determine if the conditions forconstructing a 95% confidence interval are met.d) The 95% confidence interval is (2.795, 19.454). Does this interval provide convincing evidence thatplaying three games of racquetball increases the amount of lactate acid in the blood?

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Answered: 20 17 17 40 se are paired data. 3. 2.

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20 17 17 40 se are paired data. 3. 2.

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

Correlation

Correlation defines a relationship between two independent variables. It tells the degree to which variables move in relation to each other. When two sets of data are related to each other, there is a correlation between them.

Linear Correlation

A correlation is used to determine the relationships between numerical and categorical variables. In other words, it is an indicator of how things are connected to one another. The correlation analysis is the study of how variables are related.

Regression Analysis

Regression analysis is a statistical method in which it estimates the relationship between a dependent variable and one or more independent variable. In simple terms dependent variable is called as outcome variable and independent variable is called as predictors. Regression analysis is one of the methods to find the trends in data. The independent variable used in Regression analysis is named Predictor variable. It offers data of an associated dependent variable regarding a particular outcome.

Question

The effect of exercise on the amount of lactic acid in the blood was examined. Eight males were
selected at random from those attending a week-long racquetball training camp. Blood lactate levels
were measured before and after playing three games of racquetball. Note the data below:
Player
1
2
3
4
8
Before
13
20
17
13
13
16
15
16
After
18
17
40
35
30
20
33
19
a) Explain why these are paired data.
b) Calculate and interpret the mean difference.
c) Researchers would like to estimate the true mean difference (after before) on the amount of lactic
acid for the 8 males attending a week-long racquetball training camp. Determine if the conditions for
constructing a 95% confidence interval are met.
d) The 95% confidence interval is (2.795, 19.454). Does this interval provide convincing evidence that
playing three games of racquetball increases the amount of lactate acid in the blood?

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