Comparing Data

Directions: Determine if the data collected is biased and what the bias may be.

Jeffrey surveyed a football game. He asked a small sample from the crowd how many games they attend every month.
Here is what he found:

10 fans stated one game a month
5 fans stated two games a month
3 fans stated three games a month
2 fans stated four games a month

• Yes, there is bias. He swapped the data to favor the most games attended.

• Yes, there is bias. The graph is missing data.

• No, there is no bias. The graph captures his survey.

• No, there is no bias. He swapped the data to favor the most games attended.

Directions: Evaluate the data collection method and identify any potential bias.

During a basketball game, Sarah conducted a survey. She asked a small group of attendees how many games they watch on TV each month.
Here is what she found:

8 fans stated one game a month
6 fans stated two games a month
4 fans stated three games a month
2 fans stated four games a month

• Yes, there is bias. She altered the data to show more games watched.

• Yes, there is bias. The survey does not represent all attendees.

• No, there is no bias. The survey accurately reflects her findings.

• No, there is no bias. She altered the data to show more games watched.

Maya wants to know how 8th grade students at her school prefer to spend their free time. She creates a survey and randomly selects 100 students from all 8th grade classes to answer. Here are the results:

• 30 students chose playing sports

• 25 students chose watching TV

• 20 students chose reading

• 15 students chose playing video games

• 10 students chose other activities

What type of graph should Maya use to display the data? Why is her survey not biased?

• Bar Graph; No bias because the sample is random and representative of the entire group.

• Circle Graph; Yes there is bias - The sample is not random and not representative of the entire group.

• Circle Graph; No bias because the sample is random and representative of the entire group.

• Bar Graph; Yes there is bias - The sample is not random and not representative of the entire group.

Look at the bar graph below, which shows the number of snacks sold at the school store last week:

Which of the following statements best explains why this graph might be misleading?

• The data is wrong because too many snacks were sold.

• The scale on the y-axis does not start at zero, which exaggerates the differences between the bars.

• The colors of the bars are too bright.

• The order of snacks should have been alphabetical.

Select the type of graph that would best represent each set of data. Explain why you chose that graph type.

• Bar Graph; Shows comparison of specific numbers

• Line Graph; Shows comparison of specific numbers

• Circle Graph; Shows comparison of specific numbers

Directions: Select the type of graph that would best represent each set of data. Explain why you chose that graph type.

• Bar Graph; Comparison of categorical data

• Circle Graph; categorical data

• Line Graph; comparison of numbers over time

Select the type of graph that would best represent each set of data. Explain why you chose that graph type.

• Bar Graph; Categorical Data

• Circle Graph; Comparison of categorical data

• Line Graph; Data changes over time

Select the type of graph that would best represent each set of data. Explain why you chose that graph type.

• Bar Graph; Categorical Data

• Line Graph; Data changes over time

• Circle Graph; comparing categorical data

A student is comparing the number of books read by different 8th-grade classes over a month. The student plans to create a bar graph to show this data.

To create this bar graph, the student does NOT need to include –

• the number of books each class read

• the name of each 8th grade class

• the reading level of each student in the class

• the total number of books read

A school cafeteria surveys students on their favorite lunch option and wants to show the percentage breakdown using a circle graph.

To create this circle graph, the cafeteria staff does NOT need to include –

• the number of students who chose each lunch option

• the name of each lunch option

• the percentage of students who preferred each option

• the time lunch is served each day