Data Collection and Sample

Is this a valid statistical question? What proportion of New Jersey residents would choose vanilla as their favorite ice cream flavor?

• Yes! You need to collect data to answer this question.

• No! It's just a yes or no question.

How much Vitamin C does orange juice contain? A nutrition magazine measures the amount of Vitamin C in 50 half-gallon containers of a popular juice brand from 10 different grocery stores.

• The 50 half-gallon jugs of orange juice

• All the jugs of orange juice in each grocery store.

• All of the orange juice the company makes.

• The amount of Vitamin C in each jug or orange juice.

Elvira selects every 5th student in the lunch line to determine if students at the school are satisfied with school lunch.

• Cluster Random Sample

• Systematic Random Sample

• Simple Random Sample

• Volunteer Sample

Estimate the number of students in your school who play video games more than 10 hours per week.

• Census

• Sample Survey

• Experiment

• Observational Study

A sample should be

• representative of  only middle school students only

• a very large group

• representative of the population

• representative of people who volunteer

A gaming website wanted to find out which console its visitors owned. Which choice best represents a population?

• All of the website visitors

• Visitors who are on the website for more than 5 minutes

• Visitors to the XBox section

• Visitors to the PS5 section

A random selection of people are called every morning for a week to determine if television shows are too violent. 

• Census

• Sample Survey

• Experiment

• Observational Study

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

• Group

• Sample

• Population

• Bias

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 hands out an index card and asks ALL of her students to write down the following information: age, height (in inches), and what grade they are in.

Which of the following best describes her method of data collection?

• Census

• Simple Random Sample

• Cluster Random Sample

• Stratified Random Sample