Unit 1 Part 2 Day 1 Notes Review

Data are original data that are gathered for the first time by an investigator for a specific purpose. 

• Primary Data

• Secondary Data

• Experimental Study

• Observational Study

Randomly selecting 50 email addresses from a company's client database to send a customer satisfaction survey.

• simple random

• stratified

• systematic

• self-selected

A researcher imposes a treatment to collect data on their response to the treatment.

• Primary Data

• Secondary Data

• Experimental Study

• Observational Study

Existing data that have already been gathered by an investigator in the past. 

• Primary Data

• Secondary Data

• Experimental Study

• Observational Study

A researcher observes individuals and measures variables without controlling the individuals or their environment.

• Primary Data

• Secondary Data

• Experimental Study

• Observational Study

Drawing names from a hat to choose participants for a game show.

• simple random

• stratified

• cluster

• systematic

• convenience

Dividing a hospital's patient population into different age groups (e.g., children, adults, elderly) and selecting a random sample from each group for a patient satisfaction survey.

• simple random

• stratified

• cluster

• systematic

• convenience

Dividing a college class into freshmen, sophomores, juniors, and seniors, then randomly selecting 5 students from each grade.

• simple random

• stratified

• cluster

• systematic

• convenience

Randomly selecting five shopping malls in a city and surveying all the stores within those malls to gather customer opinions.

• simple random

• stratified

• cluster

• systematic

• convenience

Studying the reading habits of students in a university by randomly selecting three departments and surveying all the students in those departments.

• simple random

• stratified

• cluster

• systematic

• convenience