Chapter 1
Math 214 Statistics (Chapter 1 Data
Collection) Study Guide Q&A
Question Answer
A study is conducted to determine
The study is an observational
if there is a relationship between
study because the study
Parkinson's disease and childhood
examines individuals in a
head trauma. Doctors look at the
sample, but does not try to
hospital records for patients with
influence the response
Parkinson's disease for any
variable.
childhood head trauma.
Students are randomly divided into
groups. One group is taught typing
The study is an experiment
using a traditional keyboard
because the researchers
method; the other is taught typing
control one variable to
using an alternative keyboard
determine the effect on the
method. After 1 taught month,
response variable
each group is given a typing test to
compare typing speed.
FFifty highschool students are The study is an experiment
divided into groups. One group is because the researchers
, shown a video on car safety. The
control one variable to
other is not. After one week, both
determine the effect on the
groups are questioned about their
response variable
accident record.
A sample size "n" from a
population of size "N" is a
simple random sampling if
Simple Random Sampling
each sample possible from the
population "N" has an equal
chance of occuring
A_______ is obtained by dividing
the population into groups and
Cluster sample
selecting all individuals from within
a random sample of the groups
A________ is obtained by dividing
the population into homogeneous
Stratified sample
groups and randomly selecting
individuals from each group
To estimate the percentage of Systematic sampling
defects in a recent manufacturing
batch, a quality control manager at
Ford selects every 10th truck that
comes off the assembly line
Math 214 Statistics (Chapter 1 Data
Collection) Study Guide Q&A
Question Answer
A study is conducted to determine
The study is an observational
if there is a relationship between
study because the study
Parkinson's disease and childhood
examines individuals in a
head trauma. Doctors look at the
sample, but does not try to
hospital records for patients with
influence the response
Parkinson's disease for any
variable.
childhood head trauma.
Students are randomly divided into
groups. One group is taught typing
The study is an experiment
using a traditional keyboard
because the researchers
method; the other is taught typing
control one variable to
using an alternative keyboard
determine the effect on the
method. After 1 taught month,
response variable
each group is given a typing test to
compare typing speed.
FFifty highschool students are The study is an experiment
divided into groups. One group is because the researchers
, shown a video on car safety. The
control one variable to
other is not. After one week, both
determine the effect on the
groups are questioned about their
response variable
accident record.
A sample size "n" from a
population of size "N" is a
simple random sampling if
Simple Random Sampling
each sample possible from the
population "N" has an equal
chance of occuring
A_______ is obtained by dividing
the population into groups and
Cluster sample
selecting all individuals from within
a random sample of the groups
A________ is obtained by dividing
the population into homogeneous
Stratified sample
groups and randomly selecting
individuals from each group
To estimate the percentage of Systematic sampling
defects in a recent manufacturing
batch, a quality control manager at
Ford selects every 10th truck that
comes off the assembly line
