What percentage of variation in y is explained by the least-squares model? (Round your answer to one decimal place.) % (d) For a neighborhood with x = 25% change in population in the past few years, predict the change in the crime rate (per 1000 residents). (Round your answer to one decimal place.) crimes per 1000 residents 5. [-/4 Points] DETAILS BBBASICSTAT8 4.1.014.5. MY NOTES ASK YOUR TEACHER Let x be the average number of employees in a group health insurance plan, and x 3 y 40 3 30 28 20 LA USE SALT (a) Make a scatter diagram of the data and visualize the line you think best fits the data. 40 40 40 40 35 35 centage) as percentage) as percentage) y (average cost 30 y (average cost 30 y (average cost 30 as percentage) y (average cost 30 25 25 25 25 20 20 20 20 HOME 10 20 30 40 50 70 10 20 30 40 50 60 70 10 20 30 40 50 60 70 10 20 30 40 50 60 70 x (average number x (average number x (average number x (average number C of employees) AC of employees) of employees) of employees) A (b) Would you say the correlation is low, moderate, or strong? positive or negative? moderate and negative moderate and positive O strong and negative low and positive O low and negative strong and positive (c) Use a calculator to verify that Ex = 133, Ex = 6693, Ey = 153, Ey? = 4909, and Exy = 3271. Computer. (Round your answer to four decimal places.) As x increases, does the value of r imply that y should tend to increase or decrease? Explain. O Given our value of r, y should tend to increase as x increases. O Given our value of r, y should tend onstant as x increases. O Given our value of r, we cannot draw any conclusions for the behavior of y as x increases. O Given our value of r, y should tend to decrease as x increases. Submit Answer 6. [1/1 Points] DETAILS PREVIOUS ANSWER BBBASICSTAT8 4.R.005. MY NOTES ASK YOUR TEACHER Suppose the scatter diagram of a random sample of data pairs (x, y) shows no linear relationship between x and y. Do you expect the value of the sample correlation coefficient / to be close to 1, -1, or 0? V v