6_Appropriate_Displays_Histograms_WS

Name:
Appropriate Graphs & Reading Histograms
Date:
Math 7 – Notes & HW
Choosing Appropriate Display: As you decide what type of graph to use, ask the following questions;
What type of information is this? (Categories, time, percentage, intervals of data)
What do I want my graph to show?
Display
Pictograph
Bar Graph
Double Bar Graph
Histogram
Line Graph
Double Line Graph
Circle Graph
Type of Data
Shows the # of items in a data set in specific categories with pictures
Shows the # of items in a data set in specific categories with spaced out bars
Shows & compares the # of items in 2 data sets in specific categories with spaced out bars
Shows the frequency of data that has been organized into equal continuous intervals
Shows change in a data set over a period of time with line segments
Shows & compares change in 2 data sets over a period of time with line segments
Shows & compares parts of a data set to the whole data set with percentages
Practice: Choose an appropriate graph to display the data for each situation.
1) The change in cell phone subscribers to 2 different companies over 8 years.
2) The populations of the states arranged by intervals.
3) Plant height measurements made every 2 days in a science fair report.
4) Points scored by each member of a basketball team compared to the whole team using percents.
5) The different modes of transportation that employees of a Company use to get to work.
Interpreting Data displayed in Histograms:
Use the Threatened Species Histogram for #’s 6 – 10.
6) What size are the intervals used on the horizontal axis?
7) What is the scale used on the vertical axis?
8) How many countries have at most 9 threatened species?
9) How many countries have at least 15 threatened species?
10) Can you tell whether any of the countries have zero threatened species?
Explain.
Use the Threatened Species Histogram for #’s 11 – 14.
11) What size are the horizontal intervals?
12) How many students earned at most a 70 on the History test?
13) Can you tell how many students earned a perfect score? Explain.

Directions: Choose an appropriate graph to display the data for each situation.
1) The number of each letter grade the members of a class earned on a test.
2) The number of students who have 0-2 pets, 3-5 pets and 6-8 pets.
3) The amount of beef flavored dog food sold compared to all dog food sold
4) The price of gas over the past 8 months.
5) Numbers of Americans whose first language is Spanish, Mandarin, or French using percents.
6) The number of boys verses girls in the following sports, basketball, volleyball, and soccer.
7) The scores of a class of students on a math test arranged in equal intervals.
8) The amount of money that two sisters saved over the course of 5 years.
Rich is a member of a bowling league on Tuesday and Thursday evenings. The following histogram shows his
bowling scores in numerous games.
9) How many scores are included in each horizontal interval?
10) How many times did Rich score higher than 150?
11) In what interval does the mode score lie?
12) How many games did Rich play?
13) How many times did Rich score lower than 126?
14) How many times did Rich score higher than 200?
15) How many times did Rich score at most 150?
16) Can you tell if Rich ever scored a perfect score of 300? Explain.