6.2 review

A(n) _______________________ is an entire group of objects from which data can be collected.

• Inference

• population

• random sample

• sample

• valid inference

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Making a conclusion by interpreting data is called making a(n) ________________________.

• Inference

• population

• random sample

• sample

• valid inference

Tags

CCSS.7.SP.A.2

Tom surveys 40 moviegoers by randomly choosing their names.  What type of sampling method is this?

• Random
• Convenience
• Biased

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

A(n) _______________________ is one that is true about a population based on a representative sample.

• population

• random sample

• sample

• valid inference

Tags

CCSS.HSS.IC.B.3

Making a conclusion by interpreting data is called making a(n) ________________________.

• Inference

• population

• random sample

• sample

• valid inference

Tags

CCSS.7.SP.A.2

Anthony opened a new store and wants to conduct a survey to determine the best store hours. Which is the best representative sample?

• A group of randomly selected people who come to the store in one week.

• A group of randomly selected people who visit his website on one night.

• Every person he meets at his health club one night.

• The first 20 people who walk into his store one day.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

The dot plots show the number of calls that two radio stations receive each day for a ten-day period. The two shows are shown at the same time. Which of the following inferences based on the median values is valid?

• The radio shows receive similar amounts of calls.

• Radio Show 1 generally receives more calls.

• Radio Show 2 generally receives more calls.

Tags

CCSS.7.SP.B.4

Margo wants to convince her father to change her curfew from 9 P.M. to 10 P.M. She gathers data on curfew times from a random sample of students at her middle school. Can Margo use these data to present a valid inference that will convince her father? Explain.

• Yes; Most students have a curfew of 10 P.M. or later.

• Yes; More students have a curfew of 9 P.M. than any other time.

• No; Most students have a curfew of 9 P.M. or earlier.

• No; More students have a curfew of 10 P.M. or 11 P.M. than 8 P.M.

Tags

CCSS.7.SP.A.2

6. Ana wants to know the average student’s opinion of the tardy policy at her school. Which group of students should she survey in order to achieve the most accurate results?

• A. Thirty randomly selected students from her school
• B. Thirty students who are rarely tardy
• thirty of her friends

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

True or False: Random samples can represent the population

• True

• False

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1