Statistical Graphs Unit Review

Statistical Graphs Unit Review

Lesson Goals

• Students will feel at ease and prepared for their unit test.

• Students will recall the data and statistics learning that has occurred throughout the unit.

Standards

• 6.DS.1: Recognize a statistical question as one that anticipates variability in the data related to the question and accounts for the variability in the answers. Understand that a set of data collected to answer a statistical question has a distribution which can be described by its center, spread, and overall shape

• 6.DS.2: Select, create, and interpret graphical representations of numerical data, including line plots, histograms, and box plots. 

Standards

• 6.DS.3: Formulate statistical questions; collect and organize the data (e.g., using technology); display and interpret the data with graphical representations (e.g., using technology).

• 6.DS.4: Summarize numerical data sets in relation to their context in multiple ways.

Important Terms

• Data: information in number form

• Frequency: How often something happens

• Outliers: a piece of data that has a value much less than or much greater than the rest of the data

Important Terms

• Range: The difference between the minimum value and the maximum value in a data set.

• Minimum: the piece of data that has the least value in a set of data.

• Maximum: the piece of data that has the most value in a data set.

What makes a Statistical Question?

• Statistical questions are questions that can have more than on answer.

• What is 2+2? Who is the leading scorer in MLB? What are the measurements of Northside MS,? None of these are statistical questions.

Multiple Choice

Which question is statistical?

• How many visitors came to the museum each month last year?

• What is the address of the museum?

• What time does the museum open tomorrow?

Multiple Choice

Which question is statistical?

• Where did you celebrate your last birthday?

• What is the average age of my friends?

• What are the ages of my friends' grandparents?

Line Plots

• Displays the frequency of each data value in a data set.

• Sometimes called a dot plot

• The total number of xs or dots equals the total number of datat values in the set of data.

Multiple Choice

The line plot show the distances, in miles cyclists completed on Saturday. How many cyclists went at least 11 miles?

• 10

• 1

• 3

Histograms

• A histogram is a graphical display of data using bars of different heights.

• In a histogram, each bar groups numbers into ranges (or bins)

Multiple Choice

The histogram shows the ages of the members of the community chorus. How many people in the chorus are 50 or older?

• 31

• 15

• 13

Multiple Choice

The histogram shows the ages of people in a community chorus. How many people in the chorus are younger than 40 years old?

• 31

• 14

• 35

Stem and Leaf Plot

• A Stem and Leaf Plot is a special table where each data value is split into a "stem" (the first digit or digits) and a "leaf" (usually the last digit).

Multiple Choice

The stem and leaf plot lists scores earned on a science test. How many students earned a score of 70 or less?

• 6

• 8

• 4

Multiple Choice

The stem and leaf plot lists the scores earned by students on a math test. How many students earned a score of 90 or greater?

• 12

• 8

• 6

Box and Whisker Plot

• A box and whisker plot—also called a box plot—displays the five-number summary of a set of data. The five-number summary is the minimum, first quartile, median, third quartile, and maximum. In a box plot, we draw a box from the first quartile to the third quartile.

Box and Whisker Plot

• The median is the value separating the first half of the data from the second half of the data.

• To find the median, you either find the middle most number, or take the two closest number to the middle, add them and divide by 2.

Multiple Choice

The box plot represents this data set. {16, 16, 16, 18, 18, 20, 24, 28, 30, 34} What value does the letter "A" represent on the box plot of the data?

• 20

• 16

• 18

Multiple Choice

What is the median of the data represented by the box plot?

• 65

• 12.5

• 20

Multiple Choice

What is the median of this data?

{12, 15, 18, 20, 23, 24, 40, 45}

• 20

• 23

• 22