find the variance for the given data 7 7 2 5 1

_____ indicates the strength and direction of an association while _____ shows the amount of variance one variable explains in the other. Group of answer choices a. r; r2 b. r2; r c. coefficient of determination; regression line d. regression line; coefficient of determination

Draw a scatter diagram for the data. Plot the least-squares line on your scatter diagram.

What is the LSRL fequation or the given data?   x    3     4     7     13     15     16     y    41     37     26     21     24     11

A sample of n = 4 scores has a sum of squares = 60. What is the variance of these scores?       20     15     60     30

The heights, in inches, of the four members of a barbershop quartet of singers are listed below. 72,68,67,73 Find the population variance for this data set. Round to one decimal place if necessary.

A food bank investigates if the number of times their donors walk by a homeless person each week impacts donors’ charitable contribution to the food bank. The data are presented below in standard form.     # of homeless people seen each week Donation to food bank Donor ZX ZY 1 -1.3 0.36 2 0.64 -0.09 3 -1.1 1.26 4 -0.14 0.14 5 1.41 -0.54 6 -0.52 -0.09 7 1.03 -1.9 8 0.64 -0.99 9 0.83 0.36 10 -1.49 1.49   What does ΣZXZY equal? A) 941B) 7.86C) -7.16D) -4.44       What is the correlation (Pearson’s r) between the number of homeless people donors see each week and their donation to the food bank (rounded to 2 decimal places)?  A) .98B) -.80C) .72D) -.56     What is the obtained t-value for this r? A) -2.96B) -16.35C) -3.72D) -1.89     What are the degrees of freedom?  A) 4B) 20C) 8D) 10      What is the critical t-value?  A) 3.68B) 2.31C) 2.01D) 3.30     What is your conclusion?  A) There is…

Solution and working

+ + + + + 200 210 220 230 240 250 260 270 280 290 300 310 320 330 340 350 360 370 380 Car speed (km/h) + Car B Car A The box plots above show car speed data for Car A and Car B. Which one of the box plots shows more variance? Car A Car B Both have equal variance

A population of grades for a statistics class of six students is given below:   71,63,68,80,85,82   Find the variance for this population. Population Variance =