Question

Use the data in the table below to complete parts​ (a) through​ (c).

x y

4 27

7 36

9 29

12 32

14 25

18 25

20 22

45 9

​(a) Construct a scatterplot of the data

(b) Identify any possible outliers.

(c) Determine if the point is influential.

Answer 1

A. A Scatter Plot will be constructed in the Form of Graph using the given value of X and YB. Outliers are the ponts which are quite away and not inline with the rest of the Points, Here the Last Point having 45 at X axis and 9 and Y Axis does not seems in trend with other point could be outlier

C. To find the if the point is influential or not we will run the regression in excel twice. Once with the Outlier point and then excluding the point .And if the Intercept vary alot we can say that outlier is influential. After running the regression we find that Intercepts are 34.78 with all data set and 34.36 excluding Outlier. It does not seem to be very much influential