Question

Many factors may affect​ fans' decision to go to a ball game. Is it possible that fans prefer teams with an older pitching​ staff? ​a) Examine a scatterplot of​ Attend/Game and PitchAge. Check the conditions for regression. ​b) Do you think there is a linear association between Attendance and Pitcher​ Age? ​c) Compute and discuss the regression model.

Answer 1

A) The linearity conditions are satisfied.

b) Yes there is positive linear association because attendance per game increases then pitcher age also increases.

c) The pitcher age increases by 1 year the average attendance tend to increase by about 5511 fans.

Explanation:

a)

We have to find scatter plot

First enter all data in excel

Select all data ----------> Click on Insert --------> Scatter ------->Click on first graph

We get( check the first attached for the excel computation)

Conditions.

A) The linearity conditions are satisfied.

b) Yes there is positive linear association because attendance per game increases then pitcher age also increases.

c) y : Dependent variable = attendance per game

x : independent variable = pitchers age

We can solve this question using excel.

First enter data into excel.

Click on Data -------> Data Analysis --------> Regression ------->

Input

Input Y Range : select y values

Input X Range :select values of x.

Output Range : select any empty cell

---------> ok

We get ( check the first attached for the excel computation)

The regression equation is

Attendance = - 124506 +5511 x age

Test statistic for slope is 6.797

P-value for test statistic is 0.0000191

The pitcher age increases by 1 year the average attendance tend to increase by about 5511 fans.

Answer 2

AnswerRegression is about prediction Y on X or other wise. Where R =squared root of explained variation over total variation. The number of rooms the house sufficient: The number of rooms in house not sufficient.

Explanation: