GB 513 – unit 6

December 5, 2013

Key Metrics

ABN has highest average Rating of the three networks

ABN has smallest variance of the three networks

ABN also has the smallest standard deviation shown as standard error on the table

CHARTING

AVERAGE BY MONTH

CBC

ANOVA

Compares two or more populations

Shows how populations interact

Returns the probability- value of p – of an F value occurring by chance

Decision rule

Reject null hypothesis if the observed F value is greater than the critical F value (table)

MAD & MSE

Tells the researcher how spread out from the means your group of numbers is.

The smaller the value the better.

MAD= Σ|eᵢ|/ number of forecasts

MSE= Σeᵢ²/ number of forecasts

Analyzes the magnitude of

*…show more content…*

R²= 0.0096 – this is a measure of goodness of fit

Indicates model is not a good predictor

r = 0.115185 - measure of correlation – indicates degree of relatedness of ratings and ratings that include a star

The variables are not correlated in a significant way

Null Hypothesis

Is equivalent to saying this happened by chance

In this model the null hypothesis is adding a star to the movie has no effect on ratings

The alternative hypothesis is that there is an effect on ratings when a star is added

Hₒ:β=0

Hₐ:β≠0

Results

Model showed that it is not a good predictor of ratings using the variable adding a star

Should the network hire stars? Not based on the results from this model.

The network needs to do further testing of additional variables to get a better idea of what might help predict ratings.

Regression

Ratings versus Previous Ratings

Rating as the dependent variable

Previous Ratings as the independent variable

Regression

Ratings versus fact and star

Ratings as the dependent variable

Fact & Star as the independent variables

Explanation of