Unit 12 Day 1: Types of Statistical Studies

Which scenario is best described as an observational study?

• for a class project, students in health class ask every tenth student entering the school if they eat breakfast.

• A social researcher wants to learn whether or not there is a link between attendance and grades. She gathers data from 15 school districts.

• A researcher wants to learn if there is a link between children's daily amount of physical activity and their overall energy level. During lunch at the local high school she distributed a questionnaire.

• Sixty seniors are randomly divided into two classes. One class uses graphing calculators all the time, the other class never uses them. Final exam grades are used to determine if there is a link.

Tags

CCSS.HSS.IC.B.3

Cheap and Fast Gas is conducting a consumer satisfaction survey. Which method of collecting data would most likely lead to a biased sample?

• interviewing every 5th customer to come into the station

• interviewing customers chosen at random by the computer at checkout

• interviewing customers who call an 800 number on the receipt

• interviewing all customers who come into the station on a given day chosen at random out of a hat.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Which statement about statistical analysis is false?

• Experiments can suggest patterns and relationships (correlation) in data

• Experiments can determine cause and effect relationships

• Observational studies can determine cause and effect relationships

• Observational studies can suggest patterns and relationships (correlation) in data

Tags

CCSS.HSS.IC.B.3

A researcher randomly divides 50 bean plants into 2 groups. He puts one group by the window to receive natural light and the other group under artificial light. Which data collection method would this be considered?

• Experiment

• Observational Study

• Survey

• Systematic Sampling

Tags

CCSS.HSS.IC.B.3

The operator of the local mall wants to find out how many of the mall's employees make purchases at the food court while they are working. In total there are 1023 employees who work at the mall. The best method to obtain a random sample of the employees would be to survey:

• all 170 employees at the larger stores

• 50% of the employees at the food court

• every employee

• every 30th employee who enters the mall for one week

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1