statistics week 2 lab

Statistics – Lab Week 2

Name:
Math221

Creating Graphs

1. Create a Pie Chart for the variable Car -

2. Create a histogram for the variable Height –

3. Create a stem and leaf chart for the variable Money –

Stem-and-Leaf Display: Money

Stem-and-leaf of Money N = 20
Leaf Unit = 1.0

9 0 124456667
(3) 1 249 8 2 128 5 3 03 3 4 27 1 5 2

Calculating Descriptive Statistics

4. Calculate descriptive statistics for the variable Height by Gender –

Gender
Mean
Standard deviation
Females
67.273
2.533
Males
69.78
4.21

Select File > Save Worksheet As to save the data set. You must either keep a copy of this data or download it again off the web site for future labs.

Short Answer Writing Assignment

All answers should be complete sentences.

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

According to the pie chart in question 1, the most common colors of cars are silver and blue. Both colors are at a 25%. This answer was derived by visual comparison and also checking the data.

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

The histogram was more skewed left. Most students’ heights were between the 64 and 72 inch range with 7 students at 70 inches on the taller pole.

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

What is seen in the stem and leaf plot is that most of the data is shown on the lower end within the 0 stem. With this information the distribution is right-skewed.

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.
(Rounded) the average height for females is 67.3