The table shows the swim times for the swimmers in the final heat. Find and interpret the interquartile range of the swim times.

The middle half of the swim times vary by no more than 1.2 seconds.

The middle quarter of the swim times vary by no more than 1 second.

The middle half of the swim times vary by no more than 1 second.

The middle quarter of the swim times vary by no more than 1.2 seconds.

What can you infer Mr. Barrett's class about the shape of the Dot Plot?

The data in Mr. Barrett’s have an outlier of 8, but the rest of the data are also clustered around 1 or 2 siblings.

The data in Mr. Barrett’s have an outlier of 12, but the rest of the data are also clustered around 1 or 2 siblings.

The data in Mr. Barrett’s have an outlier of 8, but the rest of the data are also clustered around 5 or 6 siblings.

The data in Mr. Barrett’s have an outlier of 9, but the rest of the data are also clustered around 4 or 5 siblings.

Mrs. Connie wants to know the average student’s opinion of the tardy policy at our school. Which group of students should she survey in order to achieve the most accurate-non-biased results?

30 randomly selected students from our school

30 students who are often tardy

30 students who are rarely tardy

At Centre Middle School, the 7th graders will conduct a survey to decide where they want to go on a field trip. Which method will result in the least biased decision?

to randomly choose some 7th grade students to select a location

to randomly ask 8th grade students who went on a field trip last year

to ask all 7th grade teachers and administrators for a location

to ask the Beta Club to choose a location

Mr. Thrasher wants to know how the students at Cedar Bluff rate the cafeteria. He surveyed the hungry baseball team after practice last week to rate the school cafeteria. Is this a biased sample of the school's population?

Yes, because it only asked one group of students

No, the baseball team has the smartest students

Yes, because it's voluntary survey

No, the baseball team are good food critics

Unit 5 Review

Authored by Jennifer Strain

Mathematics

6th - 8th Grade

CCSS covered

Used 6+ times

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MULTIPLE CHOICE QUESTION

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