Question

Chrome File Edlt view History Bookmarks People Window Halp Wed 6:08 PM Isabelle aE Take Test-Catin Ghanem 自 https://www.mathxl.com/StudentyPlayerTest.aspx?testid-19439393 Intersession 2019-M119 (CRN: 71336) Caitlin Gharineh & 1/23/19 6:08 PM Test: Final Exam - Chapters 11, 12, 14 Time Remaining: 01:14:11 Submit Te8t This Question: 1 pt 6 of 9 I completel This Test:9 pts pcssible Question Helo x 2 6 Find the regression equat on tor the dola points. y- (Round ta two comal places as reodad) A. B. D. 9 CB. Price remairs constantas age increaes D. Trere is no apparent relatonship batwwan ao and prica. d. icanty the predictar and raspense arabk. CC. The predictor wanable is ae ard the response varibl is pricc. D. The predictor wornabc ambuane and the response variables arc ago anc prcc Clak to selact yor arsa1s).

Answer 1

A) Lease square regression equation.

Y = b₀ + b₁ *x

Or Price = b₀ + b₁ * age

b₀ is Intercept , we can find intercept using excel function =INTERCEPT( Y data set column range, x data set column range )

b₁ is Slope , we can find intercept using excel function =SLOPE( Y data set column range, x data set column range )

Regression equation :

$\hat{y}$ = 407.83 - 23.83x

B) We can use excel to draw scatter plot , Select the both data sets ( excluding headings and go to Insert menu -->Charts --> select Scatter plot )

Option A is the correct scatter plot for given data set.

C) Relationship :

Option A : Price tends to decreases as age increases.

D) The variable on X axis is predictor variable and variable on Y axis is response variable

Option C : the predictor variable is Age and response variable is Price.

E) From the scatter plot we can say that there is no any extreme data points present in the data set.

Option B : There is no outlier and no influential observations.