Random Samples

12 ounce shampoo bottle lasts Mike 16 weeks.  How long would you expect an 18-ounce bottle of the same brand to last him?

• 24 weeks
• 6 weeks
• 30 weeks
• 20 weeks

Tags

CCSS.6.RP.A.3B

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 not a good sample in this case?

• 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

Tags

CCSS.7.SP.A.1

The entire group studied is called the

• sample
• population

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

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?

• thirty students who are often tardy
• thirty students who are rarely tardy
• thirty of her friends
• thirty randomly selected students from her school

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

Karley surveys each of the thirteen-year-old students and concludes that 20% of all thirteen-year-old students in the school sleep with a teddy bear. Is this a census or a sample?

• census
• sample
• no way of telling

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

_________ is a sample in which each individual or object in the entire population has na equal chance of being selected.

• Sample
• Population
• Random Sample
• Quartile

Tags

CCSS.7.SP.A.1

CCSS.7.SP.A.2

CCSS.7.SP.B.4

In a survey of a sample of computer users, 8% said their computer had a malfunction that needed to be repaired by a service technician.

• parameter
• statistic

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4

In  a recent year, the average math scores for all graduates on the ACT was 21.1.

• parameter
• statistic

Tags

CCSS.HSS.IC.A.1

CCSS.HSS.IC.B.4