Math 7 Unit 10 - Statistics

• Population: Student council
  Sample: Those attending the Thanksgiving parade

• Population: Those attending the Thanksgiving parade
  Sample: Student council

• Population: All students everywhere
  Sample: Those who go to parades

• Population: All Thanksgiving parades
  Sample: Student council

• Population: Students in Mrs. Johnson's class

  Sample: Students with brown hair in Mrs. Johnson's class

• Population: Students with brown hair in Mrs. Johnson's class

  Sample: Students in Mrs. Johnson's class

• Population: Students everywhere

  Sample: Students with brown hair everywhere

What percentage of voters are NOT planning to vote for Candidate A?

• 62%

• 38%

• 12.4%

• 24%

How many 6th and 7th graders were surveyed here?

• 40

• 80

• 100

• 60

What percentage of 6th graders surveyed are involved in yearbook?

• 25%

• 75%

• 10%

• 33%

Only a sample of 7th grade was surveyed here. If there are actually 200 students in 7th grade, then how many 7th graders are involved in the student jump rope?

• 2

• 10

• 40

• 20

A company surveyed its employees to ask about their job satisfaction. 22 out of 30 people surveyed said they were satisfied at their job. If the actual number of employees at this company is 960, then how many would you expect to be satisfied with their job?

• 704

• 660

• 938

• 930

The chart shows the number of dollars withdrawn at an ATM cash wall. What is the mean number of dollars withdrawn at this ATM?

• 40

• 30

• 50

• 70

What is the mean of this data set?
 $1,\ 3,\ 4,\ 4,\ 5,\ 7,\ 8,\ 10$  

• 5.25

• 6

• 4.5

• macaroni and cheeeese!

What is the Mean Absolute Deviation (MAD), of this data set?

 $9,\ 12,\ 13,\ 14,\ 14,\ 16$  

•  $1.\overline{6}$  

• 13

• 10.6

• 0.6