data are 2. Use these data to answer Questions 2d dlu 2U. These as Chapter 5 Dat
ID: 3044842 • Letter: D
Question
data are 2. Use these data to answer Questions 2d dlu 2U. These as Chapter 5 Data Set 3. Speed to complete a Strength (number of pounds 50-yard swim) 21.6 23.4 26.5 25.5 20.8 19.5 20.9 18.7 29.8 28.7 bench-pressed) 135 213 243 167 120 134 209 176 156 a. Using either a calculator or a computer, compute the Pearson cor relation coefficient. these data using the general range of very weak Also b. Interpret strong ive analysis compare with the vielmination. How does compute the coefficient of to very How 3. Rank the following correlation coefficients on strength of their rela tionship (list the weakest first). coefficients 71Explanation / Answer
Answer:
a).
Correlation Matrix
speed
strength
speed
1.000
strength
0.2692
1.000
10
sample size
Correlation coefficient =0.2692
b).
r= 0.2692, is weak correlation
coefficient of determination = r2 = 0.2692*0.2692=0.0725
7.25% variations are shared by the variables.
Correlation Matrix
speed
strength
speed
1.000
strength
0.2692
1.000
10
sample size
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