nest scze qestions, A rando sample of 25 Teyota Corellas thas price (in dellars)
ID: 3050934 • Letter: N
Question
nest scze qestions, A rando sample of 25 Teyota Corellas thas price (in dellars) and the age of the car (in years) Use the following to ansner were recorded. The scatterplot is seen below and the regression equation is Selling Price- 17,79564-1325.58 (Age) 28) The seanerplot shows atny relationshigp b) Weak, negative, linear trend e) Strong positive, linear trend d) Strong, negative, lincar trend response variable is the: a) Number of Months b) Age of the Corolla e) Selling Price d) 25 Corollas 29) The a) For every 1 year increase in Age, the selling price increases on average by $1,325 b) For every 1 year increase in Age, the selling price decreases on average by $1,325.58. c) For every 1 dollar increase in selling price, the age of the car increases on average 17.796 30) Provide an interpretation of d) For every 1 dollar increase in selling price, the age of the care decreases on average by 1.326 years 31) Use the regression equation to predict the average selling price for an 8.1 year old Corolla. a) $7,058.44 b) $28,53284 c)$1,341.81 d) This prediction should not be made because it is an extrapolation a) The age of a Corolla worth 1,325.58 is, on average, about 8 or 9 years old b) The age of a Corolla worth SO is, on average, about 15 or 16 years old. c) The Selling Price of a brand new (0 year old) Corolla is $17,795.64 on average d) The Selling price of a brand new (O year old) Corolla is $16470.06 on average. 32) Provide an interpretation of the y-intercept of the regression line.Explanation / Answer
28 ) -----> b) Strong negative ,linear trend
Because graph shows decrecresing trend it is show strong negative linear trend .
29) ------> c) Selling price
So here selling price is responce variable beacuse here we want predict the selling price .
30)--- b) for every 1 year increses in Age the selling price will decresses by 1325.58
Beacuse you can see model has minus sign that's why it decreasing .
31) Selling Price = 17795.64-1325.58*Age
=17795.64-1325.58*8.1
= 7058.442
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