statistics key terms

A study was conducted at a local college to analyze the average cumulative GPA’s of students who graduated last year. What does 'Sample' refer to in the study?

• all students who attended the college last year

• the cumulative GPA of one student who graduated from the college last year

• a group of students who graduated from the college last year, randomly selected

• all students who graduated from the college last year

A study was conducted at a local college to analyze the average cumulative GPA’s of students who graduated last year. What does 'Statistic' refer to in the study?

• all students who attended the college last year

• the cumulative GPA of one student who graduated from the college last year

• a group of students who graduated from the college last year, randomly selected

• the average cumulative GPA of students in the study who graduated from the college last year

A study was conducted at a local college to analyze the average cumulative GPA’s of students who graduated last year. What does 'Population' refer to in the study?

• all students who attended the college last year

• the cumulative GPA of one student who graduated from the college last year

• a group of students who graduated from the college last year, randomly selected

• all students who graduated from the college last year

A study was conducted at a local college to analyze the average cumulative GPA’s of students who graduated last year. What does 'Parameter' refer to in the study?

• the average cumulative GPA of students who graduated from the college last year

• all students who attended the college last year

• a group of students who graduated from the college last year, randomly selected

• all students who graduated from the college last year

Cars with dummies in the front seats were crashed into a wall at a speed of 35 miles per hour. We want to know the proportion of dummies in the driver’s seat that would have had head injuries, if they had been actual drivers. We start with a simple random sample of 75 cars. What is the population?

• all cars containing dummies in the front seat.

• the 75 cars selected by a simple random sample.

• the proportion of driver dummies (if they had been real people) who would have suffered head injuries in the population.

• proportion of driver dummies (if they had been real people) who would have suffered head injuries in the sample.

Cars with dummies in the front seats were crashed into a wall at a speed of 35 miles per hour. We want to know the proportion of dummies in the driver’s seat that would have had head injuries, if they had been actual drivers. We start with a simple random sample of 75 cars. What is the statistic?

• all cars containing dummies in the front seat.

• the 75 cars selected by a simple random sample.

• the proportion of driver dummies (if they had been real people) who would have suffered head injuries in the population.

• proportion of driver dummies (if they had been real people) who would have suffered head injuries in the sample.

Cars with dummies in the front seats were crashed into a wall at a speed of 35 miles per hour. We want to know the proportion of dummies in the driver’s seat that would have had head injuries, if they had been actual drivers. We start with a simple random sample of 75 cars. What is the sample?

• all cars containing dummies in the front seat.

• the 75 cars selected by a simple random sample.

• the proportion of driver dummies (if they had been real people) who would have suffered head injuries in the population.

• proportion of driver dummies (if they had been real people) who would have suffered head injuries in the sample.