Find the correlation coefficient using the following information: Sxx: 25 Syy: 32 Sxy:-14
Find the correlation coefficient using the following information: Sxx: 25 Syy: 32 Sxy:-14
Consider the follow set of ?=5 (?,?) pairs: ? 20 25 26 30 35 ? 21 30 35 31 37 NOTE: SXX = 126.8, SXY = 116.2, SYY = 152.8, ?¯ = 27.2, and ?¯ = 30.8. Compute the sample correlation correct to three decimal places of accuracy. Correlation = ?=
Consider the follow set of ?=5 (?,?)(x,y) pairs: ?x 20 25 26 30 35 ?y 21 30 35 31 40 NOTE: SXX = 126.8, SXY = 139.6, SYY = 197.2, ?¯x¯ = 27.2, and ?¯y¯ = 31.4. Compute the sample correlation correct to three decimal places of accuracy. Correlation = ?=
14. (2 pts) For a set of data points, the linear correlation coefficient = -0.54. Find the coefficient of determination. Use formula to find the linear correlation coefficient.
b. Find the linear correlation coefficient, r, then determine whether there is sufficient evidence to support the claim of a linear correlation between the two variable. The linear correlation coefficient is r _______
find the coefficient of determination, given that the value of the linear correlation coefficient, r, is -0.451 D Question 8 1 pts Find the coefficient of determination, given that the value of the linear correlation coefficient, r, is -0.451. O 0.451 O 0.797 O 0.549 O 0.203
Continuous random value (X,Y) has a probability density:14sinxsiny0S{0≤x≤π;0≤y≤π}otherwiseFind the correlation coefficient of random values X and Y
12. (20 pts) Compute the linear correlation coefficient of the following set of data points: X y 19 1 4 18 14 5 6 9 6 1 Use formula to find the linear correlation coefficient.
14) Fill in the Blank. Find the value of the linear correlation coefficient (Round off to three decimals). The paired data below consist of the test scores of 6 randomly selected students and the number of hours they studied for the test. Show your work on your own paper to earn the credit. If you use a TI-83/84, just indicate which function you have selected. Hours 5 10 4 6 10 9 Score 64 86 69 86 59 87 Question...
Problem 3. (16 points) Find the Z-score for a normal measurement that satisfies each of the following statements. (a) The point z with 11 percent of the observations falling below it. Z= (b) The closest point z with 44 percent of the observations falling above it. Note: You can earn partial credit on this problem. preview answers Problem 4. (17 points) A random sample of n = 80 in-coming college freshmen showed that 32 were planning to bring a car...
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.