Quiz about Experimental Design and Sampling Unit Review

Question 1

Four groups of randomly selected people are assigned a different diet. After six months, the blood pressures of each group are compared.

Accepted Answer

Experiment

Answer

Observational Study

Question 2

A placebo is...

Accepted Answer

an inactive "look-alike" meant to seem real

Answer

a rare type of African bird indigenous to the foothills of Morocco

Answer

Something used to hunt with

Answer

the change in symptoms as a result of an inactive "look-alike"

Question 3

What is the placebo effect?

Accepted Answer

When someone believes a medication works but the medication was not medicated.

Answer

Something that affects the neurological pathways causing people to do nonsensical things.

Answer

A dangerous experiment that can harm the person that is experimented.

Answer

A disease that effects the brain, worse than meningitis

Question 4

Identify the explanatory variable in this scenario: The weeds in my garden are 2 inches taller today after the heavy rain we received last night.

Accepted Answer

Amount of rain

Answer

Height of weeds

Question 5

A researcher stood at a school parking lot entrance to see if the color of a car is related to the driver not wearing a seatbelt.

Accepted Answer

Observational Study

Answer

Experiment

Question 6

Identify the response variable in this scenario: A recent study compared the average number of hours of sleep each night each person reported as well as the number of cups of coffee they consumed that day.

Accepted Answer

Hours of sleep

Answer

Number of cups of coffee

Question 7

All sample surveys are observational studies

Accepted Answer

TRUE

Answer

FALSE

Question 8

A professor finds that people who are obese have higher cholesterol levels than those who are not obese.

Accepted Answer

Observational Study

Answer

Experiment

Question 9

To ensure that the experiment results are valid it is important that the experiment have...

Accepted Answer

All of the above

Answer

Replication

Answer

Control Group

Answer

Randomization of treatments

Question 10

An experiment in which neither the subjects nor the people who work with them know which treatment each subject is receiving is called

Accepted Answer

double blind

Answer

placebo

Answer

controlled

Answer

replicated

Question 11

For which case below would a simulation be most appropriate?

Accepted Answer

trying to determine if a rocket will launch

Answer

trying to see is more sleep leads to more energy

Answer

trying to determine whether or not weather has an effect on mood

Question 12

Political webpages often allow readers to rate whether they strongly agree, agree, disagree, or strongly disagree with the President's decision on any given situation. This is a form of:

Accepted Answer

Voluntary Response

Answer

Convenience Sampling

Answer

Simple Random Sampling

Answer

Systematic Random Sampling

Question 13

Marianne wanted to know students' opinion on the new schedule at school. She places students' names in a container and randomly picks out 20 names.

Accepted Answer

Simple Random Sampling

Answer

Convenience Sampling

Answer

Systematic Random Sampling

Answer

Volunteer response

Question 14

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:

Accepted Answer

Systematic Sampling

Answer

Simple Random Sample

Answer

Voluntary Response

Answer

Stratified Sampling

Question 15

Marianne wanted to know students' opinion on the new schedule at school. So she randomly selected 2 students from each class during second period.
This is a form of:

Accepted Answer

Stratified Random Sampling

Answer

Convenience Sampling

Answer

Simple Random Sampling

Answer

Cluster Sampling

Question 16

In a survey of a sample of high school students, 43% said that their mother has taught them the most about managing money.

Accepted Answer

statistic

Answer

parameter

Question 17

Sixty-two of the 97 passengers aboard the Hindenburg airship survived its explosion.

Accepted Answer

parameter

Answer

statistic

Question 18

Cause and Effect can be shown with experiments or observational studies

Accepted Answer

FALSE

Answer

TRUE

Question 19

A poll is taken from 100 seniors in a high school where the senior class has 575 students. This is an example of a ______________.

Accepted Answer

Sample

Answer

Population

Question 20

A beverage company wanted to see if people in the United States liked their new logo.

Which choice best represents a population?

Accepted Answer

Every person in the United States.

Answer

A selection of logo artists.

Answer

A selection of shoppers from different shoppers from different states.

Answer

3,800 children age 5-15

Experimental Design and Sampling Unit Review

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