Question

7. [4/15 Points) DETAILS PREVIOUS ANSWERS in a certain year the number of driver deaths per 100,000 for the different age groups was as follows: Number of Driver Deaths per 100,000 27 18 Age 15-24 25-39 40-69 70-79 80+ 11 18 22 Part(a) For each age group, pick the midpoint of the interval for the x-value. (For the 80+ group, use 85.) Age group Midpoint 15-24 195 ✓ 25-39 32 ✓ 40-69 54.5 ✓ 70-79 74.5 ✓ 80+ 85 Part (6) Using "Midpoint as the independent variable and "Number of driver deaths per 100,000" as the dependent variable, make a scatter plot of the da Graph Layers After you add an object to the graph you can use Graph Layers to view and edit its properties 24 20 FH MacBook Air El 5

Answer 1

Part a Midpoint 19.5 Age 940up 15 - 21 25 - 39 40 - 69 10 - 19 52 54.5 74 .5 85 80 +

part c r x2 у? Y 27 18 11 19.5 32 54.5 7415 380.25 1024.00 ay 526.5 576.0 599.5 1 341.0 1870.0 729 324 121 324 484 2970.25 5550.25 7225.00 18 85 22 2 Ey En²= EN= Ey a Eny = 265.5 96 17149.75 1982 4913 ñ = Eyn - 265.5 = 53.1 and ý = Ey=abc= 19, 2 5 byn en Eny - En Ey nen? (En)? 5 ( 4913) - (265.5)(96) 5 (17149.75) - (265.5)2 - 923 152585 -0.0604908739 byn a -0.061 Regration equation of y on nis (y ý ) = byn (nan) (9-19.2) = -0.061 (2 - 53.1)

y-19.23 -0.061X + 3,239) y 0.06tn+ 3.2391 + 19.2 y = -0.061X + 22,4391 ŷ = 22.439 - 0.061% Part 7 correlation coe oefficient r = n Eny - (EN (Ey) Inen²-(8x² Vn sy²-(Eyj² 5(4913) – (265.5) (96) √5 (17149.75)-(265,572 5(1982)-(9602 0.283639065 .. r = -0.2836 : Conselation coefficient = -0.2836 Part e ① For n=17 ŷ = 22.439 - 0.061 X = 22.439-0-0G1 (11) :. ģ- 21,402 :. The fatality rate for 17 year old driver is 2114 deaths 100,000 على (ii) for n=61 ŷ = 22.439 - 0061 (61) c. = 18.718 ... The fatality rate for 61 year 18.7 deaths per 100,000 - old driver is