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IDS 270 - Exam #1 Questions and Correct
Answers/ Latest Update / Already Graded
How do you calculate the average?
Ans: add all values up, divide by total number of values
Average is the same thing as...
Ans: Mean
Observational study
Ans: We observed the behavior or ask people questions as
they're going about their day-to-day lives. Ex: call people and
ask them how often they eat out.
Experiment
Ans: We impose some treatment on people and then observe
their behavior or ask questions. Ex: give people a drug and then
do chemical analysis of their blood.
All rights reserved © 2025/ 2026 |
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Confounded variables
Ans: Two variables where the effect of one on the dependent
variable cannot be separated from the effect of the other. Ex: if
you take drugs and drink alcohol, and then have a car accident,
the effect of the drug versus the alcohol cannot be separated
from each other as the cause of the accident
Population
Ans: The set of everything. Ex: all the people in America
Sample
Ans: A small group pulled from the population. Ex: sample 40
voters from the population of America
Sample distribution
Ans: The set of number within one sample
Voluntary response sampling
Ans: People volunteer to give data for a study. Ex: people text
a phone number if they agree with a statement and text a
different one if they disagree
All rights reserved © 2025/ 2026 |
IDS 270 - Exam #1 Questions and Correct
Answers/ Latest Update / Already Graded
How do you calculate the average?
Ans: add all values up, divide by total number of values
Average is the same thing as...
Ans: Mean
Observational study
Ans: We observed the behavior or ask people questions as
they're going about their day-to-day lives. Ex: call people and
ask them how often they eat out.
Experiment
Ans: We impose some treatment on people and then observe
their behavior or ask questions. Ex: give people a drug and then
do chemical analysis of their blood.
All rights reserved © 2025/ 2026 |
, Page |2
Confounded variables
Ans: Two variables where the effect of one on the dependent
variable cannot be separated from the effect of the other. Ex: if
you take drugs and drink alcohol, and then have a car accident,
the effect of the drug versus the alcohol cannot be separated
from each other as the cause of the accident
Population
Ans: The set of everything. Ex: all the people in America
Sample
Ans: A small group pulled from the population. Ex: sample 40
voters from the population of America
Sample distribution
Ans: The set of number within one sample
Voluntary response sampling
Ans: People volunteer to give data for a study. Ex: people text
a phone number if they agree with a statement and text a
different one if they disagree
All rights reserved © 2025/ 2026 |
