CCSS.Math.Content.7.SP.A.2

Shannon has a bag of jelly beans. She removed one jelly bean, recording the color, and then replaced it. She repeated the process several times and record her results in the table. What is the experimental probability of her selecting a red jelly bean?

• 11/33

• 1/3

• 1/4

• 18/26

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CCSS.Math.Content.7.SP.A.2

A wildlife reserve has a population of 120 elephants. A group of researchers trapped 42 elephants and recorded their vital statistics. Of the trapped elephants, 35 were female. If that rate holds true for the entire population of 120 elephants, how many female elephants are on the wildlife reserve?

• 100
• 120
• 132
• 216

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CCSS.Math.Content.7.SP.A.2

A sample chosen at random form a randomly chosen subgroup or subgroups.

• random sample
• systematic sample
• stratified sample

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CCSS.Math.Content.7.SP.A.2

A question that anticipates and accounts for a variety of answers.

• Statistical Question
• Range
• Mean
• Box Plot

Tags

CCSS.Math.Content.7.SP.A.1

CCSS.Math.Content.7.SP.A.2

A city council member wanted to know how her constituents felt about a planned rezoning. She randomly selected 75 names from the city phone directory and conducted a phone survey.

• The population is everyone listed in the city phone directory; the sample is the 75 people selected.
• The population is residents of the city; the sample is the registered voters in the city.
• The population is registered voters in the city; the sample is everyone listed in the city phone directory.

Tags

CCSS.Math.Content.7.SP.A.1

CCSS.Math.Content.7.SP.A.2

A quality control inspector at a clothing manufacturer is checking to make sure collars on shirts are sewn correctly.  Twenty shirts are randomly chosen and 3 have defective collars.  Shirts that are defective are discarded.  Based on this sample, how many shirts do you predict are likely to be discarded in a week when 500 shirts are produced? 

• 17
• 20
• 75
• 425

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CCSS.Math.Content.7.SP.A.2

Kris has a bag that contains only red marbles, green marbles, and purple marbles. Kris pulls a marble from the bag, records the color of the marble and puts it back in the bag. She performs 25 pulls and draws 8 red marbles, 12 green marbles, and 5 purple marbles. Based on the data, about how many times would Kris pull a red marble if she performed 1,000 pulls?

• 200

• 320

• 330

• 470

Tags

CCSS.Math.Content.7.SP.A.1

CCSS.Math.Content.7.SP.A.2

4. A company makes DVDs and randomly selects 25 from 1500 to test them to see if they work.

• Biased
• Unbiased

Tags

CCSS.Math.Content.7.SP.A.2

According to a random telephone survey of 200 adults, 75% of all working adults in the U.S. are satisfied with their current job. What is the population in this survey?

• 200 adults
• adults in the U.S.
• 75% of adults

Tags

CCSS.Math.Content.7.SP.A.1

CCSS.Math.Content.7.SP.A.2

There are 400 students at Polly's school. She surveyed a random sample of 80 students to find their favorite hobby. 19 said they like to read. 30 said they like to be with friends. 8 said they like to do crafts. 23 said they like to play sports. Polly infers that doing crafts is the least popular hobby at her school.

Yovani estimates that about 200 students in the school favor playing sports as a hobby. Do you agree?

• Yes, I used a proportion to find the number of students in the school who likely to prefer to play sports. 23/80 = 200/400; 200 students

• No, I used a proportion to find the number of students in the school who likely to prefer to play sports. 23/80 = 115/400; 115 students

Tags

CCSS.Math.Content.7.SP.A.1

CCSS.Math.Content.7.SP.A.2