1. Measures of Central Tendency And Graphs

2. sum
difference
divided 20 4
22-18= 4
𝟏𝟖+𝟏𝟗+𝟐𝟏+𝟐𝟐 𝟒
middle
significantly 55 13
most
Spread out 80
75-80
80-90
101-75= 26

3. Rotate around the class and write your data for each question on the appropriate chart paper. Then have a seat.

4. Student Questionnaire
How many pets do you have?
2. What is your shoe size?
3. How many siblings do you have?
What is your birth month? (Ex: write 1 for January, 2 for February)
 5. What is your birth order?
6. How many extracurricular activities are you involved in?

5. Central Tendency Worksheet
With a partner use the data on the chart paper to answer the questions
Show your work for your answers!!!!
1.   What is the mean of the data set of pets your class has?
2.   What is the mode and median of the data set of siblings?
3.   Is the range of shoe sizes in the class large or small? How did you determine your answer?
4.   Is the mean of your classes’ birth order larger or smaller that its median?
5.   Which median is larger, your classes’ birth month or the extracurricular activity?

7. Box and Whisker Plot Review
Use the given data to make a box-and-whisker plot.
31, 23, 33, 35, 26, 24, 31, 29
Step 1. Order the data and find the smallest value, first quartile, median, third quartile, and largest value.
smallest value: 23
largest value: 35
first quartile: = 25 2
third quartile: = 32 2
Median: = 30 2

8. Box and Whisker Plot Continued
Use the given data to make a box-and-whisker plot.
Step 2. Draw a number line and plot a point above each value.

9. Step 3. Draw the box and whiskers.
Min
Max
Lower
Quartile Q1
Upper
Quartile Q3
Median Q2
Interquartile Range = Q3 - Q1 = = 7

10. Practice the graphs we reviewed with the Graphing Class Data worksheet.
Question 1: Construct a Line Plot
Question 2: Construct a Bar Graph
Question 3: Construct a Line Graph
Question 4: Construct a Box Plot
Question 5: Construct a Histogram
Question 6: Construct a Stem and Leaf Plot