Data Analysis and Probability Quiz

Based on the dot plots, which statement correctly compares the two data sets?

• The range of test scores in sixth grade is less than the range of test scores in seventh grade, and the mean test score in sixth grade is less than the mean test score in seventh grade.

• The range of test scores in sixth grade is less than the range of test scores in seventh grade, and the mean test score in sixth grade is greater than the mean test score in seventh grade.

• The range of test scores in sixth grade is greater than the range of test scores in seventh grade, and the mean test score in sixth grade is less than the mean test score in seventh grade.

• The range of test scores in sixth grade is greater than the range of test scores in seventh grade, and the mean test score in sixth grade is greater than the mean test score in seventh grade.

A company manufactures cell phones. In August, a random sample of 125 cell phones were inspected, and 3 phones were found to be defective. The company manufactured 8,000 cell phones in August.

Based on the results from the sample, about how many cell phones are expected to be defective?

• 64 cell phones

• 192 cell phones

• 2,667 cell phones

• 3,360 cell phones

The box plots compare the gross earnings, in millions of dollars, of movies during the months of August and November. Which statement correctly compares the two data sets?

• The median in August is about half of the median in November.

• The median in November is about 400 more than the median in August.

• The difference in the medians is about half of the range in November.

• The difference in the medians is about half of the interquartile range in August.

Kate conducts a survey at her middle school to determine the students’ favorite sport. Which sampling method would best produce a representative sample of the population?

• Kate surveys the football team.

• Kate surveys seventh grade students.

• Kate surveys every fourth student entering the school.

• Kate surveys every eighth student from a roster of the choir members.

Based on the data, which statement is true? The mean height of the 7th grade girls is greater than the mean height of the 8th grade girls.

• True

• False

Based on the data, which statement is true? The girls in both grades have the same median height.

• True

• False

Based on the data, which statement is true? The girls in 7th grade tend to be taller than the girls in 8th grade.

• True

• False

A factory produces light bulbs. In a random sample of 200 light bulbs, 5 were found to be defective. The factory produced 10,000 light bulbs in total. Based on the sample, how many light bulbs are expected to be defective?

• 1,000 light bulbs

• 250 light bulbs

• 500 light bulbs

• 750 light bulbs

1. For a class assignment, Tyler will conduct a survey to find out what students like to do after school. He asks the first 10 people he sees in the gymnasium before school what they like to do after school. Which statement correctly explains whether Tyler's sample is a random sample?

• Tyler’s sample is not random because he only asks 10 people

• Tyler’s sample is not random because he asks people in a gymnasium.

• Tyler’s sample is random because he asks the first 10 people he sees.

• Tyler’s sample is random because he asks each person the same question

Tags

CCSS.7.SP.A.1

Andre wants to survey a random sample of the student body in his school to find out which day after school would work best for students to do volunteer work for a local charity. Which

sample would best represent the student body?

• asking twenty students waiting in line for lunch

• asking twenty students on their way to the bus after school

• asking one person from the seventh grade daily for twenty days

• asking one person each from twenty different classrooms during the first class period

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2