Statistical Studies and Sampling Method

Interview every 10th student who enters the school in the morning.

• simple random

• voluntary response

• systematic

• convenience

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

• systematic

• simple random sample

• convenience

• Self - selected (volunteer)

Identify each of the following as an observational study or an experiment. Determine which brands of orange juice people prefer. The people are randomly chosen at the supermarket and are asked to taste both brands without knowing which brand they are drinking.

• Experimental

• Observational Study

For each situation, choose the most appropriate technique for collecting data. Use the technique exactly once.

Compare average class size for math classes and English classes in your high school.

• Census

• Sample Study

• Observational Study

• Experiment

What type of sampling is shown?

• Simple Random Sample

• Systematic Sample

• Cluster Sample

• Stratified Sample

A ​ ​ (a)   is a representative portion of the population from which information is gathered.

• sample

• statistics

• parameter

• population

A town council creates a survey to collect data on preferences for the location of a new park. What would be a valid sampling method to collect the survey data?

Select the VALID method(s)

Tags

7.SP

Population or Sample? A quality control engineer is curious about the thickness of paint on a car at her factory. She randomly selects 30 points on the car and measures the paint thickness at each of those points.

• Population

• Sample

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:

• Simple Random Sample

• Stratified Random Sample

• Voluntary Response

• Systematic Random Sampling

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

She picks the student in every 5th seat.

• Simple Random

• Systematic

• voluntary response

• convenience