Unit 9 Review

(9.1) What type of study method is this?

The junior class at Clovis East are deciding on which three flowers to plant in front of the school.

• Observation

• Survey

• Experimental

• Random

(9.1) What type of study method is this?

A scientist wants to study how the amount of water humans drink affects their diet.

• Oberservation

• Survey

• Experimental

• Random

(9.1) What type of sampling is this?

Interview the first 30 students who enter the school in the morning.

• Random

• Systematic

• Convenience

• Self-Selected

(9.1) What type of sampling is this?

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

• Random

• Systematic

• Convenience

• Self-Selected

(9.1) What type of sampling is this?

Marianne wanted to know students' opinion on the new schedule at school. She places all students' names in a container and picks out 20 to survey. 

• Random

• Systematic

• Convenience

• Self-Selected

(9.1) What type of sampling is this?

Disneyland often surveys its guests as they exit a restaurant during their visit. The surveyor stands at the restaurant exit, counts the number of people leaving, and surveys every 25th guest. This is a form of:

• Random

• Systematic

• Convenience

• Self-Selected

(9.1) What type of sampling is this?

A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys.

She selects the first five who raise their hands.

• Random

• Systematic

• Convenience

• Self-Selected

 

(9.1) A ___ is a large group that includes everything being studied.

• Sample

• Stratified Sampling Method

• Population

• Self-Selected

 

(9.1)  

A ___ is a small portion of the population used to gather data from.

• Sample

• Stratified Sampling Method

• Population

• Self-Selected

(9.2) The scores on a state math test are normally distributed. The mean score is 500 and the standard deviation is 25. Find the data that falls within 2 SD's of the mean

• 400 and 500

• 300 and 600

• 450 and 550

• 300 and 500