1. Number of Cans Collected
Bell Work
The stem-and-leaf plot shows the number of cans of food collected by students for a food drive.
Number of Cans Collected
What is the greatest number of cans collected What is the least number of can collected?
What is the median of the data?
3. What is the mean? Round to a whole number.
56 cans; 30 cans
43 cans
43 cans

2. Samples and Their Graphs-Review

3. Box and Whisker Plot Example
Minutes spent on homework each night
Find the following values: Minimum: Maximum: Range: Median: Lower Quartile: Upper Quartile: Inter-quartile Range: 25 95
95-25 = 70 75 65 90
90-65 = 25

4. Line Plot Example Spelling Test Grades 89 90 90 25 What is the mean?
What is the median?
What is the mode?
What is the range? 89 90 90 25

5. Identify the population and sample in the following survey:
To gauge students’ preference for a new school mascot, the Student Council President surveys her soccer team.
Population
Students at her school
The population is the group we would like to know information about, in this case, the students in the school. We want to know what type of mascot they would prefer.
The sample is the part of the population we plan to survey, in this case, the students on the President’s soccer team.
Sample
Her soccer team
What type of sample is this? Is it bias or unbias?
Convenience sample, bias

6. 87, 75, 85, 77, 74, 82
Solution:
Column 1
Column 2
Column 3
Column 4
Data
Mean
Difference
Absolute Value 87 75 85 77 74 82
Sum
Count
MAD -7 5 -5 3 6 -2 80 7 5 3 6 2 28 6
4.7

7. Skills Check! No talking!
When you finish turn your paper over and put it on the corner of your desk.
Then prepare for
Friday’s quiz.