LT 6B Statistical Study

A survey should always be ____ and ____.

• random and biased
• random and unbiased

Ana wants to know the average student’s opinion of the tardy policy at her school. Which group of students should she survey in order to achieve the most accurate results?

• thirty students who are often tardy
• thirty students who are rarely tardy
• thirty of her friends
• thirty randomly selected students from her school

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 sample should be

• representative of  only middle school students only
• a very large group
• representative of the population
• representative of people who volunteer

Identify the following data set:

....a survey of just Mr. Winking’s students in ratings of Meadow creek High School for a study on Meadow creek High School

• Population

• Sample

Why do you think restaurant collect data?

• To know if they poison you

• To know if their food is good for you

• To know if their chef is handsome

Why do you think bakery collects data from their daily sales?

• To know how much profit they make

• To know if they missing money or not

• To know which item is selling the best

The data collection methods are:

• Qualitative and Research

• Quantitative and Research

• Qualitative and Quantitative

• Quantitative and Sources

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.

What is the population in this study?

• 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.