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U1_Practice on Key Definitions #2

Total questions: 28

Worksheet time: 1hrs 29mins

Name
Class
Date
1.
Interview the first 30 students who enter the school in the morning. 
a)
simple random
b)
voluntary response
c)
systematic
d)
convenience
2.
Assign each car in a dealership a number and then use a random-number table to select the cars to be inspected. 
a)
systematic
b)
random sample
c)
convenience
d)
volunteer response
3.
Why do we randomly select our samples?
a)
to increase bias
b)
to reduce bias
c)
so we don't get the same answers from everyone
d)
because it's easier
4.

One group of subjects was given an herbal supplement and another group was given a placebo. After one year, the number of illnesses each group had was compared.

a)

Observational Study

b)

Experiment

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.

a)

Observational Study

b)

Experiment

6.
In a survey of a sample of computer users, 8% said their computer had a malfunction that needed to be repaired by a service technician.
a)
parameter
b)
statistic
7.
In  a recent year, the average math scores for all graduates on the ACT was 21.1.
a)
parameter
b)
statistic
8.
A mayor wanted to see if the people in his town thought he was doing a good job.
Which choice best represents a statistic?
a)
The percentage of all townspeople who believe the mayor is doing a good job.
b)
The percentage of townspeople surveyed who believe the mayor is doing a good job.
c)
All townspeople.
d)
A random selection of 100 townspeople.
9.
A musician wanted to see what people who bought his last album thought about the songs.
Which choice best represents a parameter?
a)
The percentage of all people who bought his last album that thought the songs were good.
b)
50 people who bought the musician's last album
c)
85% of the 50 people surveyed thought the songs were good.
d)
All 
10.

Carlos wants to know the favorite sport of people at his school so he asks his basketball team.

a)

Biased

b)

Unbiased

11.

A company makes DVDs and randomly selects 25 from 1500 to test them to see if they work.

a)

Biased

b)

Unbiased

12.

A teacher splits her classes up by period. She then randomly picks 3 students from each period to do a survey.

a)

Stratified.

b)

Systematic

c)

Cluster

d)

Biased.

13.

A teacher wants to know how well her students are doing on a topic. She randomly picks one class to survey.

a)

Simple Random

b)

Cluster

c)

Stratified

d)

Systematic

14.

Is this a statistical question?

"What is the tallest building in Chicago, IL?"

a)

YES

b)

NO

15.

Is this a statistical question?

"What is the most popular store among teenagers in the Turtlecreek Mall?"

a)

YES

b)

NO

16.
A student surveys mathematics teachers to get their opinion on teaching.  What is the sample?
a)
All teachers in the world.
b)
All teachers within the school.
c)
All mathematics  teachers in the school.
d)
All teachers except mathematics teachers.
17.

The lunch program at Saxe is being revised to align with new nutritional standards. They send a survey out to every student in the school to learn about school lunches. Does this represent the population or a sample?

a)

Population

b)

Sample

18.

A researcher wants to know the average height of students in a school. He measures the height of every 10th student entering the school. What type of sampling method is this?

a)

Systematic

b)

Random

c)

Stratified

d)

Cluster

19.

A company wants to test a new product and selects 50 employees from different departments to try it out. What type of sampling method is this?

a)

Simple Random

b)

Stratified

c)

Cluster

d)

Convenience

20.

In a survey, 60% of the respondents said they prefer online shopping over in-store shopping. Is this a parameter or a statistic?

a)

Parameter

b)

Statistic

21.

An observation that deals with measurements or numbers.

a)

quantitative observation

b)

qualitative observation

c)

data

d)

information

22.

Assigning participants to experimental and control conditions by chance, minimizing preexisting differences between those assigned to the different groups.

a)

random sampling

b)

double blind procedure

c)

random assignment

d)

random mugging

23.

In an experiment, the group that is not exposed to the treatment being studied.

a)

experiemental group

b)

random sampling

c)

control group

d)

confounding variable

24.
How many total people took the survey?
a)
50
b)
150
c)
100
d)
200
25.
A sample should be
a)
representative of  only middle school students only
b)
a very large group
c)
representative of the population
d)
representative of people who volunteer
26.
Mrs. Trahan samples her class by picking 10 numbers from her hat and each number is assigned to a student. This is ______________ random sampling.
a)
Systematic
b)
Simple
c)
Stratified
d)
Cluster
27.

Which of the following are considered quantitative variables? (Choose all that apply).

a)

Average driving speed

b)

Type of car you own

c)

Month of your birthday

d)

Your age

28.

Is this a statistical question?

"What is the most popular store among teenagers in the Turtlecreek Mall?"

a)

YES

b)

NO

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