Statistics and Probability (7MAAP)

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 students from a roster of the choir members.

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7.SP.1

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

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7.SP.2

Jaime rolls a number cube and spins a colored spinner. The spinner is

divided into three equal sections. The tree diagram shows all the

possible outcomes that can occur.

Which statements are true? Select two answer choices.

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7.SP.8a

The dot plots show the math test scores from sixth and seventh grade students.

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.

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7.SP.3

Dave completed a random sample of fish from two ponds. The results are shown.

Based on the samples, which statement best compares the lengths of the fish in each pond?

• The fish in Pond A are generally longer and have less variability in

  length than the fish in Pond B

• The fish in Pond A are generally longer and have greater variability

  in length than the fish in Pond B

• The fish in Pond A are generally shorter and have less variability in

  length than the fish in Pond B

• The fish in Pond A are generally shorter and have greater variability in length than the fish in PondB

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7.SP.4

Ms. Evan allows her students of the week to spin a reward wheel.

The reward wheel is shown.

What is the likelihood of landing on the 5­point bonus section?

• likely

• certain

• unlikely

• impossible

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7.SP.5

A number cube that has sides numbered 1 through 6 is rolled 180 times.

PART A: How many times would you expect the result to be an even number greater than 2?

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7.SP.6

A number cube that has sides numbered 1 through 6 is rolled 180 times.

PART B: How many times would you expect the result to be a number less than 6?

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7.SP.6

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.

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7.SP.3

Which event is most likely to occur?

• tossing a fair coin and landing on heads

• spinning a 3 on a spinner divided into 4 equal sections numbered

  1 through 4.

• picking a red marble from a bag of marbles that contains 3 blue,

  4 red, and 2 green marbles

• rolling a number cube that has sides numbered 1 through 6

  and landing on a number less than 5

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7.SP.5