Math 373 Test Hw 1 Worksheet With Answer Key
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1Math 373
Hw 1 Recommended problems, don't turn this in.
Hw. 15:1.4abc, 1.6abc, 1.8abcd, 1.12abd. 29: 1.16ab, 1.18ad, 1.20a. Rec.15:1.1,1.3,1.5,1.7,1.9a-f,1.11ab. 29: 1.17abc, 1.19, 1.21a.
.
Draw a line chart to represent the data.
3DJH
D
Identify the experimental units on which the following
Is any learning taking place?
E
variables are measured:
Gender of a student.
D
Answers
Number of errors on an exam.
E
Age of a patient.
F
student
exam
patient
azalea plant
car.
D
E
F
G
H
Number of flowers on an azalea plant.
G
Color of a car in a parking lot.
H
discrete
continuous
continuous
discrete.
D
E
F
G
Identify the following quantitative variables as discrete or
the set of voter preferences in the state.
D
continuous.
Population in a particular town.
D
a student's score - quantitative
the student
the set
D
E
F
Weight of newspapers in a delivery truck.
E
of scores
Time to complete a sociology exam.
F
Note about
. Population, by definition, is the set of
F
Number of consumers in a poll of 1000 who consider
G
measurements, not the units being measured. Thus the
nutritional labeling important.
population for this problem is the the set of scores, not the
You are a candidate for your state legislature, and you want
set of students. The students are the experimental units or
to survey voter attitudes regarding your chances of winning.
sample elements.
Identify the population that is of interest to you and from
which you would like to select your sample.
the jeans
state of origin -- qualitative
D
E
F
G
An educational researcher wants to evaluate the
effectiveness of a new method of teaching reading.
Achievement at the end of a period of teaching is measured
A
by a student's score on a reading test.
What is the variable to be measured? Is this variable
D
T
C
quantitative or qualitative?
What is the experimental unit?
E
C
T
A
Identify the population of interest to the experimenter.
F
8/25
H
The jeans in a department store may come from California
California
I
(C), Arizona (A) or Texas (T). A random sample of 25 jeans
is selected and state of origin is recorded. The result is
C A A T C C C T T T A A C A T
D
C A T T T C A A C C
.45
What is the experimental unit?
.30
D
.25
What is the variable being measured? Is it quantitative or
E
qualitative?
Constuct a pie chart to describe the data.
F
Construct a bar chart to describe the data.
0
1
2
G
What proportion of the jeans come from Texas?
H
6/20 = 3/10
E
What state produced the most jeans?
I
14/20 = 7/10
F
A discrete variable can take on the values 0, 1, 2. A set of
D
20 measurements on this variable is as follows:
1 2 1 0 2 2 1 1 0 0 2 2 1 1 0 0 1 2 1 1
Construct a relative frequency histogram.
D
What proportion of the measurements are >1?
E
What proportion are <2?
F
1 2 3 4 5
A psychologist measures the length of time it takes a rat to
No
successfully navigate a maze on each of five days.
E
The times are
day 1
2
3
4
5
time 45
43
46
32
25
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