Statistics - Hypothesis Testing Projects

ASSIGNMENT 4 INSTRUCTIONS : Use the Help feature in MINITAB 16 to read descriptions for the data sets

ASSIGNMENT 4

INSTRUCTIONS : Use the Help feature in MINITAB 16 to read descriptions for the data sets so that you can make meaningful comments.

Use the data set SALARY. MTW in the Student12 folder. Perform the Chi
Square test for independence to determine whether gender and department are related. Use α = 0.05. Explain your results.

Use the data set GAS. MTW in the Student 9 folder.
[5 pts] (a) Compute the correlation between gallons purchased and mileage. Interpret.
[5 pts] (b) Compute the correlation between gallons purchased and cost. Interpret.

[5 pts] (c) Compute the correlation between gallons purchased and MPG. Interpret.
[5pts] (d) Which of the three variables would be the best predictor of gallons purchased? Explain.

Use the data set ASSESS .MTW in the Student14 folder.

[10 pts] (a) Use regression to find an equation that predicts the total assessed value of the home and land using the number of rooms as the independent variable. Is number of rooms significant at α = 0.05. Explain.

[ 10 pts] (b) Use regression to find an equation that predicts the total assessed value of the home and land using the area of the first floor (in square feet) as the independent variable. Is area of first floor significant at α = 0.05. Explain.

[5 pts] (c) Which equation is better for predicting the total assessed value of the home and land? Explain your answer.

[5 pts] (d) What is the total assessed value of the home and land for a home with 22 rooms? How comfortable do you feel making this prediction? Explain.