Sampling and Statistics

Chosen at random, 580 customers at a car dealership are contacted and asked their opinions of the service they received.
This is what type of sample?

• convenience

• stratified

• simple random sample

• cluster

A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys, so she randomly selects five students from the class to survey, paying no attention to their gender.
This is a form of:

• Cluster Sampling

• Systematic Sampling

• Stratified Sampling

• Simple Random Sampling

A poll about favorite sports is taken from 100 seniors in a high school where the senior class has 575 students. 23% of respondents said that baseball was their favorite sport.
The "575" is the ______

• Sample Size

• Population Size

• Statistic

• Parameter

What is Group A's Mean?

• 18.8

• 20.4

• 22.7

• 17.5

What is Group B's Mean?

• 16.2

• 20.9

• 22.4

• 19.5

What is Group B's MAD?

• 4.32

• 6.76

• 1.28

• 5.65

In your box and whisker plot that represents the number of registered voters in each home, what is your lower extreme?

• 0

• 1

• 4

• 5

In your box and whisker plot that represents the number of registered voters in each home, what is Quartile 2 (median)?

• 4

• 1

• 3

• 2

In your box and whisker plot that represents the number of registered voters in each home, what is Quartile 3?

• 4

• 1

• 3

• 2

At which shop is the median price higher?

• Shop A

• Shop B