Data Inferences

Which of the following best describes the process of finding the interquartile range for a set of data?

• Subtract the median from the mean.

• Subtract the mean from the median.

• Subtract the minimum from the maximum.

• Subtract Q1 from Q3.

What is the IQR of this box plot?

• 5

• 6

• 8

• 12

Which of the following sets of data is represented by this box plot?

• 6, 11, 18

• 6, 9, 14, 18

• 6, 9, 10, 12, 14, 18

• 6, 9, 10, 11, 13, 14, 20

Mr. Frickle was discussing the number of tornados per month two states encountered. To summarize the data, he presented the students with the following box plots. Which statement is true, according to the information?

• 100% of State B's months had more tornados than one-fourth of State A's months.

• State A has a higher median of tornados per month.

• State B has a larger first quartile than State B.

• Neither state ever has a month without tornados/

Two groups of shoppers were polled about the amount of time spent shopping in a particular clothing store. Which of statement below can be made based on the data?

• Group A has more participants.

• Group B has more participants.

• Group A had a greater percentage of its participants spend 35 minutes or more shopping.

• Group B had a greater percentage of its participants spend 40 minutes or less shopping.

A group of students spent a week recording the number of hours they slept a day and put the information into a series of box plots. Which of the following statements is true based on the data?

• Friday had the highest median of hours slept.

• Sunday had the largest IQR of hours slept.

• Tuesday had the lowest Q1 of hours slept.

• Wednesday has a larger range than Thursday.

Students spun a wheel and recorded on which color it landed. What statement is true based on the data?

• Brown was spun only one time.

• It is more likely that the wheel will land on blue or green than on yellow.

• The wheel is less likely to lang on orange or green than on yellow or blue.

• The wheel is certain to land on yellow if spun five times.

The high school students were surveyed about their coffee drinking habits. Which of the following statements is NOT true?

• Half of the freshmen said they didn't drink coffee.

• Sophomores were more likely to drink one cup of coffee or less than drink two or more.

• More juniors were surveyed than any other class.

• A greater percentage of seniors drank two or more cups of coffee a day than any other grade level.

The high school students were surveyed about their coffee drinking habits. Which of the following statements is true based on the data?

• Freshmen had the fewest number of students who only drank one cup of coffee.

• Less than half of the sophomores had two cups of coffee or more.

• Juniors had more students say they had two cups of coffee or more than any other grade level.

• Seniors preferred specially coffees over plain coffee.

A middle school conducted a survey of randomly selected 6th graders about their favorite class. The table shows the results of the survey. Which inference about all 7th graders at this school is best supported by this information?

• The number of 7th graders who chose Language Arts as their favorite class is greater than the number of 7th graders who chose Science.

• The number of 7th graders who chose Math as their favorite class is less than the number of 7th graders who chose Language Arts.

• The number of 7th graders who chose Math and Social Studies as their favorite class is less than the number of 7th graders who chose Science.

• The number of 7th graders who chose Science as their favorite class is triple the number of 7th graders who chose Social Studies.