Statistics Review

Susan polled 587 people throughout each city in her county.  Each city is the same size.  Is this sample of the residents of cities in the county likely to be biased?

• yes
• no

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Leslie surveyed the 9 youngest students in the elementary school.  Is this sample of the students in the school likely to be representative?

• yes
• no

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Aaron took a multiple choice test.  There were 25 questions, of which he answered 4 incorrectly.  At this rate, how many questions should Aaron expect to answer incorrectly if he takes a test with a total of 150 questions?

• 123
• 24
• 373
• 47

Tags

CCSS.6.RP.A.3B

At a middle school, the 7th graders will conduct a survey for where to go on a field trip. Which method will result in the least biased decision?

• to randomly ask 8th grade students who went on a field trip last year
• to randomly choose some 7th grade students to select a location
• to ask all 7th grade teachers and administrators for a location
• to ask the student council to choose a location

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

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.HSS.IC.A.1

Valid or invalid?: Mr. Bowker wants to know how many students like sports so he randomly surveys 20 football players and 10 volleyball players. Of the 30 students surveyed, 100% like sports. 

• Valid
• Invalid

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Which box and whisker plot has the smallest lower quartile (Q1)?

• Top plot
• Bottom plot

Tags

CCSS.6.SP.B.4

CCSS.HSS.ID.A.1

Which family on average is shorter?

• Maggie's 
• Lexi's

Tags

CCSS.6.SP.B.5

CCSS.6.SP.A.2

CCSS.6.SP.A.3

CCSS.6.SP.A.1

• Lake City’s daily high temperature is generally higher than Springfield’s.
• Springfield’s daily high temperature is generally higher than Lake City’s.
• Lake City’s daily high temperature is generally lower than Springfield’s.

Tags

CCSS.6.SP.B.5

CCSS.6.SP.A.2

CCSS.6.SP.A.3

CCSS.6.SP.B.4

CCSS.6.SP.A.1

Which survey question is biased? 

• During which month do you prefer to go on vacation?
• Do  you think the teacher should come back to teach even after his terrible year?
• What is your favorite color?
• What is your favorite subject?

Tags

CCSS.RL.11-12.6