Making Statistical Inferences

A sample should be

• representative of  only middle school students only
• a very large group
• representative of the population
• representative of people who volunteer

Zoie completes a report by asking 70 students across campus. She found that 48% of CIAA students do not wash their hands after using the bathroom. What is the population of her survey?

• the bathroom

• CIAA students

• 48% of students

Zoie completes a report by asking 70 students across campus. She found that 48% of CIAA students do not wash their hands after using the bathroom. What is the sample size?

• 48

• 100

• 70

• CIAA students

A recent survey of 800 seventh graders from across the state shows 4 out of 10 like to play paper football. How many students said they like to play paper football?

• 40 students
• 200 students 
• 320 students
• 8,000 students

_______ is a part of a group being surveyed.

• Sample
• Population
• Random Sample
• Quartile

_______ is the entire group of objects or individuals considered for a survey.

• Sample
• Population
• Random Sample
• Quartile

Assign each car in a dealership a number and then use a random-number table to select the cars to be inspected. 

• systematic
• random sample
• convenience
• biased sampling

Each dot represents 1 day. How many days were recorded?

• 9
• 21
• 20
• 105

Terry made the dot plot above to chart the amount of time, in minutes, that it took students to eat breakfast in the morning. How many students took 5 or more minutes to eat their breakfast?

• 11

• 12

• 14

• 16

Find the mean of these numbers:
5, 11, 2, 12, 4, 2

• 4.1
• 6
• 4.5
• 4