BOXING2.txt is Below 2. (Exercise 3.28, using R) (2 pt) Massage therapy for boxe

Question

BOXING2.txt is Below

2. (Exercise 3.28, using R) (2 pt) Massage therapy for boxers. The British Journal of Sports Medicine (April 2000) published a study of the effect of massage on boxing performance. Two variables measured on the boxers were blood lactate concentration (mM) and the boxer's perceived recovery (28-point scale). Based on information provided in the article, the data in the table were obtained for 16 five-round boxing performances, where a massage was given to the boxer between rounds. Download "BOXING2.txt" from the Blackboard and conduct a test to determine whether blood lactate level (y) is linearly related to perceived recovery (z ). Use a = 0.10. o Print your R code and results. (0.5 pt): Write the hypotheses. (0.5 pt) o Find t-value and p-value. (0.5 pt): Make conclusion. (0.5 pt)

Explanation / Answer

The complete R snippet is as follows

# read the data into R dataframe
data.df<- read.csv("C:\Users\586645\Downloads\Chegg\data.csv",header=TRUE)
str(data.df)

## the correlation test is
cor.test(data.df$LACTATE,data.df$RECOVERY)

The results are

cor.test(data.df$LACTATE,data.df$RECOVERY)

   Pearson's product-moment correlation

data: data.df$LACTATE and data.df$RECOVERY
t = 2.5969, df = 14, p-value = 0.0211 , as the p value is less than 0.05 , hence we reject the null hypothesis in favor of alternate hypothesis and conclude that the correlation between the 2 variables is signficant
alternative hypothesis: true correlation is not equal to 0
95 percent confidence interval:
0.1038218 0.8310094
sample estimates:
cor
0.5701827

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