Chi-square, Correlation, Multiple Regression
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1. A study indicated where different age groups primarily get their news: At the 0.05 level of significance, is there evidence of a significant relationship between the age group and where people primarily get their news? If so, explain the relationship
Use the Chi Square file
Age Group
Media Under 36 36-50 50+
Local TV 107 119 133
National TV 73 102 127
Radio 75 97 109
Local newspaper 52 79 107
Internet 95 83 76
2. Using the 'Cumba' database file, create a pivot table of management level versus gender. Then copy the data from the table into a chi square table to see if a relationship exists between employee genders and their management level. What can you conclude at the .05 significance level?
3.Using the 'Cumba' database file, develop a model to predict the employee's salary using the employee's age, years of experience, and gender. Since gender is nominal, use 0 for male and 1 for female. The 'Multiple Regression' file has already been pre-loaded with the data, so you need only interpret the output.
Complete the following tasks:
a.State the multiple regression equation.
b. Interpret the meaning of the slopes in the equation.
c. Predict the salary for a 40-year-old male employee with five years' experience.
d. At the .05 level of significance, determine whether each explanatory variable makes a significant contribution to the regression model.
e. Interpret the meaning of the r-squared.
f. Interpret your findings. What changes would you make to the model, given the results?
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Solution Summary
The solution studies chi-squared analysis. A multiple regression analysis is given.
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