1. Lesson 10-3 Data Distributions
Obj: The student will be able to 1) Describe the central tendency of a data set 2) Create and interpret box-and-whisker plots HWK: COS: S-ID2

2. Vocab:
measure of central tendency
mean
median
mode
range
outlier
first quartile (lower quartile)
third quartile (upper quartile)
interquartile range (IQR)
box-and-whisker plot

3. Ex 1) Identify the outlier (if any) in the data set
Ex 1) Identify the outlier (if any) in the data set. Then determine how the outlier affects the mean, median, mode and range of the data. 21, 24, 3, 27, 30, 24

4. Which measure best describes Josh’s typical score? Explain
Ex 2) Josh scored 74, 73, 80, 75, 67 and 54 on his six history tests. For each question, choose the mean, median or mode and give its value.
Which measure best describes Josh’s typical score? Explain
Which measure should Josh use to describe his test scores to his parents? Explain

5. Box-and-whisker plots steps:
Order data from least to greatest
Find median of entire data set
Find median of lower data set (1st quartile or lower quartile)
Find median of upper data set (3rd quartile or upper quartile)
Find minimum and maximum values
Plot on number line

6. Ex 3) Use the data to make a box-and-whisker plot

7. Ex 4) The box-and-whisker plots show the ticket sales, in millions of dollars, of the top 25 movies in 2000 and 2007 in the US
Which data set has a greater median? Explain
Which data set has a greater interquartile range? Explain
Which data set has a smaller range? Explain
About how much more were the ticket sales for the top movie in 2007 than for the top movie in 2000?