Drawing Inferences from Data

Brazil asks 7 classmates how many erasers and pens they carry in their bags. The mean number of erasers is 10. The mean number of pens is 4. What inference could Brazil make using this data?

• Most of Brazil's classmates carry more pens than erasers in their bags.

• All of Brazil's classmates carry more erasers than pens in their bags.

• Most of Brazil's classmates carry more erasers than pens in their bags.

• Most of Brazil's classmates carry similar amounts of erasers and pens in their bags.

Which data set shows students who tend to spend more time on homework per week?

• Finn's Data Set

• Jonah's Data Set

Mykel surveyed 15 7th graders and 15 8th graders at his school to see how many hours they spend per day listening to music. He made two box plots to compare the data sets. What inference can he draw from the data sets?

• The range is greater for the 8th graders, so there is greater variability for the 8th graders than the 7th graders.

• The person who listens to music the least is a 7th grader.

• The median is greater for the 7th graders, so they generally spend more time listening to music than 8th graders.

• No inferences can be made from the box plots.

A family is looking for a new home. The family is comparing homes in two towns. The median home price of Town 1 is ​$450,000. In Town 2, the median home price is ​$384,393. Based on the median home prices of each​ town, what inference can be​ made?

• The homes in Town 2 are more expensive.

• The homes in Town 1 and Town 2 are similarly priced.

• The homes in Town 1 are more expensive.

Approximately what percentage of the sample was dissatisfied with the housing options?

A headline misreported that 95% of students purchased books for class. By how many percentage points was the headline off?

Approximately what percent of the population rides the campus buses?

The college reports that 80% of students are pleased with their experience. By how many percentage points is the report incorrect?

Russell randomly surveys seventh-graders in his school and finds that 6 of 30 attend summer camp. If there are 200 seventh-graders in his school, about how many are expected to attend summer camp?

• 40

• 1,000

• 176

• There is not enough information to answer.

Approximately, how many students attend the campus sporting event?