4. Heights of Presidents and Runners-Up data set: determine correlation coefficient r, determine of the correlation...
2. Suppose IQ scores were obtained from randomly selected twins. For 20 such pairs of people, the linear correlation coefficient is 0.849 and the equation of the regression line is ŷ=0.68+0.99x, where x represents the IQ score of the twin born first. Also, the 20 x values have a mean of 100.9 and the 20 y values have a mean of 100.5. What is the best predicted IQ of the twin born second, given that the twin born first has...
11-13 please 11) (3) Answer the three questions below about the correlation coefficient, r. a. (1) What is the range of values that can take on? b. (1) For what value(s) of r will be predictions be best? c(1) For what value(s) of r will be predictions be worst? 12) (7) Researchers are interested in the relationship between children's IQ and the size of a family. The following hypothetical data represent eight families. number of children (X) 4 2 2...
The coefficient of determination of a set of data points is 0.598 and the slope of the regression line is 3.22 Determine the linear correlation coefficient of the data. What is the linear correlation coefficient? r=?
What is the critical value for the linear correlation coefficient, r, for a sample of size n = 15 with α = .01 ? (Round to the nearest thousandth. The linear correlation coefficient for a set of paired variables is r = .897. What proportion of the variation in y can be explained by the linear relationship between x and y? (Type the percentage rounded to the nearest hundredth without the % sign. The linear regression equation for a set...
Name: Instructor Date: Section 6. The regression line equation for a set of data is given by y-23x+. -10. The value of for this same data set is 10.1. Use α .05 a. If the lincar correlation coefficient for this data is -521, what is the best y -value for x 57 b. If the linear correlation coefficient for this data is r 972, what is the best predicted y-value for x=5? size n 15 with a 01 7. What...
The coefficient of determination of a set of data points is 0.825 and the slope of the regression line is -3.85. Determine the linear correlation coefficient of the data. What is the linear correlation coefficient? r=| | (Round to three decimal places as needed.)
Q2 The coefficient of determination of a set of data points is 0.577 and the slope of the regression line is What is the linear correlation coefficient? r (Round to three decimal places as needed.) 3.48. Determine the linear correlation coefficient of the data.
Given the linear correlation coefficient r and the sample size n, determine the critical values of r and use your finding to state whether or not the given r represents a significant linear correlation. Use a significance level of 0.05. r =-0.816, n =5 A. Critical values: = +/- 0.878, no significant linear correlation B. Critical values: =0.950, significant linear correlation C. Critical values: = +/- 0.878, significant linear correlation D. Critical values: = +/-0.950, no significant linear correlation
Given the linear correlation coefficient r and the sample size n, determine the critical values of r and use your finding to state whether or not the given r represents a significant linear correlation. Use a significance level of 0.05. r = 0.543, n = 25. SHOW WORK Group of answer choices A)Critical values: r = ± 0.396, significant linear correlation B)Critical values: r = ± 0.487, significant linear correlation C)Critical values: r = ± 0.396, no significant linear correlation...
1. Compute r, the correlation coefficient for the following set of bivariate data. Is this correlation significant? (Use = 0.05). x 1 2 3 4 5 y 2 3 6 8 9 2. Hello, For my own reference can you also explain how one goes about solving? Thanks!