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

The manager of a book store surveys people who buy mystery novels to see if the store should expand its hours.  What is the population?

• People who visit the bookstore.
• People who buy mystery novels.
• Residents of the town
• People who like to read.

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

Josie threw a handful of identically shaped buttons into the air, then collected the 27 buttons that landed in a target on the floor.  Is this a random sample of the buttons?

• yes
• no

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

The choir director in a high school wants to know how the students in the school feel about singing. If the director selects 100 girls and 100 boys to complete a survey, which method will result in a biased sample?

• The students will be selected from the choir
• The students will be selected randomly throughout the school
• The students will be selected on Wednesday afternoon before the choir concert
• The choir director will select five students from each of the forty homerooms in the school

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

You want to know how many students catch the bus to go home.  You go to the bus stop and ask students how they go home from school.  Is this a random sample or biased sample?

• BIASED
• RANDOM

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

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.

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

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

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

Becky wants to know if she should sell cranberry muffins at her bakery. She asks every customer who buys blueberry muffins if they would buy cranberry muffins. Is this a representative sample?

• Yes, it does not include people who would buy cranberry muffins but do not like blueberry muffins

• No, it does not include people who would buy cranberry muffins but do not like blueberry muffins

• Yes, it does include people who would buy cranberry muffins but do not like blueberry muffins

• No, it does include people who would buy cranberry muffins but do not like blueberry muffins

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

A school randomly chose ten English teachers and asked them which type of juice their students would prefer. Which reason best shows why this sample is biased?

• The sample didn't include students.
• The sample is too small.
• The sample can only be accurate if each teacher is included in the sample

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

What is the average shoe size? FIND THE MEAN

(round to the tenths decimal place)

Use the total from Questions #19- then divide by the # of dots.

• 8.5

• 7

• 5.5

• 7.4

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

Surveying the students at the next band practice is an example of which type of sampling method?

• Convenience

• Systematic

• Simple Random

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