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