MATH 221 Week 2 Ilab Correlation and Regression

.Create a Pie Chart for the variable Car – Pull up Graph > Pie Chart and click in the categories variables box so that the list of variables will show up on the left. Now double click on the variable name ‘Car” in the box at the left of the window. Include a title by clicking on the “Labels…” button and typing it in the correct text area (put your name in as the title) and click OK. Click OK again to create graph. Click on the graph and use Ctrl+C to copy and come back here, click below this question and use Ctrl+V to paste it in this Word document.

2.Create a histogram for the variable Height – Pull up Graph > Histograms and choose “Simple”. Then set the graph variable to “height”. Include a title by clicking on the “Labels…” button and typing it in the correct text area (put your name in as the title) and click OK. Copy and paste the graph here.

3. Create a stem and leaf chart for the variable Money – Pull upGraph > Stem-and Leaf and set Variables: to “Money”. Enter 10 for the Increment: and click OK.

The leaves of the stem-leaf plot will be the one’s digits of the values in the “Money” variable. Note: the first column of the stem-leaf plot that you create is the count. The row with the count in parentheses includes the median. The counts below the median cumulate from the bottom of the plot.Copy and paste the graph here.

4.Calculate descriptive statistics for the variable Height by Gender – Pull up Stat > Basic Statistics > Display Descriptive Statistics and set Variables: to Height. Check By variable: and enter Gender into this text box. Click OK. Type the mean and the standard deviation for both males and females in the space below this question.

5.What is the most common color of car for students who participated in this survey? Explain how you arrived at your answer.

6.What is seen in the histogram created for the heights of students in this class (include the shape)? Explain your answer.

7. What is seen in the stem and leaf plot for the money variable (include the shape)? Explain your answer.

8. Compare the mean for the heights of males and the mean for the heights of females in these data. Compare the values and explain what can be concluded based on the numbers.

9.Compare the standard deviation for the heights of males and the standard deviation for the heights of females in the class. Compare the values and explain what can be concluded based on the numbers.

10.Using the empirical rule, 95% of female heights should be between what two values? Either show work or explain how your answer was calculated.

11.Using the empirical rule, 68% of male heights should be between what two values? Either show work or explain how your answer was calculated.