Which of the following values could not represent a correlation coefficient?
A)-1
B) 0.927
C) 0
D) 1.032
Which of the following values could not represent a correlation coefficient?
4) The data below are the gestation periods, in months, of randomly selected animals and their corresponding life spans, in years. Calculate the correlation coefficient r. Gestation, x 8 2.1 1.3 1 11.5 5.3 3.8 24.3 Life span, y 30 12 6 3 25 12 10 40 5) Which of the following values could not represent a correlation coefficient? A) 0 B) 1.032 C) -1 D) 0.927
Question 7 1 pts Which of the correlation values represent a perfect linear relationship between x and y? .05 0 1 100 -1 Question 8 1 pts Match the correlation coefficient to its variable. population correlation [Choose ] sample correlation [Choose)
Calculate the correlation coefficient r, Row 1 represent the x-values and Row 2 the y-values. Then calculate it again, letting Row 2 represent the x-values and Row 1 the y-values. What effect does switching the variables have on r? 50 Row 1 27 40 57 62 129 166 197 156 140 133 172 Calculate the correlation coefficient r, letting Row 1 represent thex-values and Row 2 the y-values. r.] (Round to three decimal places as needed.)
Calculate the correlation coefficient...
Which of the following statements regarding the correlation coefficient is not true? A) The correlation coefficient has values that range from-1.0 to 1.0 inclusive. B) The correlation coefficient measures the strength of the linear relationship between two numerical variables C) A value of 0.00 indicates that two variables are perfectly linearly correlated D) All of these are true statements
1. Match the correlation coefficient to its variable.
Population Correlation (choose below)
a. c
b. p (Greek rho)
c. r
d.R
c. Greek alpha
Sample Correlation (choose below)
a. c
b. p (Greek rho)
c. r
d.R
c. Greek alpha
Question 7 1 pts Which of the correlation values represent a perfect linear relationship between x and y? 0-1 O1 0.05 100
Which of the following properties of the correlation coefficient are False choose all that apply Question 8 options: a) -1 < r < 1 b) r is not sensitive to outliers c) If you change the scale, then r stays the same d) If you add 7 to each x-value and subtract 9 from each y-value, the r stays the same e) r is called the correlation coefficient f) If you exchange x values and the y values, then r...
Which of the following are true statements about the correlation coefficient r? I. A correlation coefficient of .3 means that 30% of the points are highly correlated. II. The square of the correlation measures the proportion of the y-variance that is predictable from a knowledge of x. III. Perfect correlation, that is, when the points lie exactly on a straight line is r = 0.
Which of the following is the null hypothesis when you use the correlation coefficient? a. rho = 0 b. there is a relationship between the two variables c. there is not a null hypothesis when you test the significance of r. d. The correlation will not be negative
Compute the correlation coefficient for the data below. x values -5 -1 5 y values 5 3 -4 a. 0.932 b. –0.343 c. –0.490 d. –0.981
Determine if the following statement is true or false. A correlation coefficient close to 1 is evidence of a cause-and-effect relationship between the two variables. The statement is true O A. False. Only a correlation coefficient close to 0 indicates a cause-and-effect relationship between the two variables O B. False. A correlation coefficient should not be interpreted as a cause-and-effect relationship O c. True, but only if all the conditions for correlation are met. False. A correla.on coefficient of 1...