Student: Instructor: Assignment: Module 1 Homework Set C
(2.2 - 2.4)
Date: 02/02/22 Course: Math 146
1. Select the correct choices that complete the sentence below.
The class limit is the smallest value within the class and the class limit is the largest value within the class.
Select the correct choices that complete the sentence below.
The lower class limit is the smallest value within the class and the upper class limit is the largest value within
the class.
2. The is the difference between consecutive lower class limits.
The class width is the difference between consecutive lower class limits.
3. Determine whether the following statement is true or
false.
The shape of the distribution shown is best
classified as skewed left.
Choose the correct answer below.
True
False
4. Determine whether the following statement is true or
false.
The shape of the distribution shown is best
classified as uniform.
Choose the correct answer below.
False
True
,5. An experiment was conducted in which two fair dice were thrown 100 times. The Sum of Two Dice
sum of the pips showing on the dice was then recorded. The frequency histogram to
the right gives the results. Use the histogram to complete parts (a) through (f).
20
Frequency
10
0
2 4 6 8 10 12
Value of dice
(a) What was the most frequent outcome of the experiment?
9
(b) What was the least frequent?
12
(c) How many times did we observe an 11?
4
(d) How many more 5's were observed than 12's?
8
(e) Determine the percentage of time an 11 was observed.
4 %
(f) Describe the shape of the distribution. Choose the correct answer below.
Uniform
Bell shaped
-
Skewed right
Skewed left
, 6. The following frequency histogram represents the IQ IQs of 7th Grade Students
scores of a random sample of seventh-grade students. 80
IQs are measured to the nearest whole number. The
frequency of each class is labeled above each 60 51
Frequency
44 42
rectangle. Use the histogram to answers parts (a) 40 33
through (g).
20 12 9
2 4 2 1
0
60 70 80 90 100 110 120130 140 150160
IQ scores
(a) How many students were sampled?
200 students
(b) Determine the class width.
The class width is 10 .
(c) Identify the classes and their frequencies. Choose the correct answer below.
A. 60-69, 2; 70-79, 4; 80-89, 12; 90-99, 44; 100-109, 51; 110-119, 42; 120-129, 33; 130-139, 9; 140-149,
2; 150-159, 1
B. 65, 2; 75, 4; 85, 12; 95, 44; 105, 51; 115, 42; 125, 33; 135, 9; 145, 2; 155, 1
C. 60-70, 2; 70-80, 4; 80-90, 12; 90-100, 44; 100-110, 51; 110-120, 42; 120-130, 33; 130-140, 9; 140-150,
2; 150-160, 1
(d) Which class has the highest frequency?
A. 90 99 -
B. 100 109 -
C. 105
D. 100 110 -
(e) Which class has the lowest frequency?
A. 150 159 -
B. 155
C. 150 160 -
D. 60 69 -
(f) What percent of students had an IQ of at least 130?
6 % (Type an integer or a decimal. Do not round.)
(g) Did any students have an IQ of 167?
A. Yes, because there is a bar in the 150-159 class.
B. Yes, because there is a frequency of a score of 165.
C. No, because there is a bar in the 150-159 class.
D. No, because there are no bars, or frequencies, greater than an IQ of 160.
YOU ANSWERED: A.
4
(2.2 - 2.4)
Date: 02/02/22 Course: Math 146
1. Select the correct choices that complete the sentence below.
The class limit is the smallest value within the class and the class limit is the largest value within the class.
Select the correct choices that complete the sentence below.
The lower class limit is the smallest value within the class and the upper class limit is the largest value within
the class.
2. The is the difference between consecutive lower class limits.
The class width is the difference between consecutive lower class limits.
3. Determine whether the following statement is true or
false.
The shape of the distribution shown is best
classified as skewed left.
Choose the correct answer below.
True
False
4. Determine whether the following statement is true or
false.
The shape of the distribution shown is best
classified as uniform.
Choose the correct answer below.
False
True
,5. An experiment was conducted in which two fair dice were thrown 100 times. The Sum of Two Dice
sum of the pips showing on the dice was then recorded. The frequency histogram to
the right gives the results. Use the histogram to complete parts (a) through (f).
20
Frequency
10
0
2 4 6 8 10 12
Value of dice
(a) What was the most frequent outcome of the experiment?
9
(b) What was the least frequent?
12
(c) How many times did we observe an 11?
4
(d) How many more 5's were observed than 12's?
8
(e) Determine the percentage of time an 11 was observed.
4 %
(f) Describe the shape of the distribution. Choose the correct answer below.
Uniform
Bell shaped
-
Skewed right
Skewed left
, 6. The following frequency histogram represents the IQ IQs of 7th Grade Students
scores of a random sample of seventh-grade students. 80
IQs are measured to the nearest whole number. The
frequency of each class is labeled above each 60 51
Frequency
44 42
rectangle. Use the histogram to answers parts (a) 40 33
through (g).
20 12 9
2 4 2 1
0
60 70 80 90 100 110 120130 140 150160
IQ scores
(a) How many students were sampled?
200 students
(b) Determine the class width.
The class width is 10 .
(c) Identify the classes and their frequencies. Choose the correct answer below.
A. 60-69, 2; 70-79, 4; 80-89, 12; 90-99, 44; 100-109, 51; 110-119, 42; 120-129, 33; 130-139, 9; 140-149,
2; 150-159, 1
B. 65, 2; 75, 4; 85, 12; 95, 44; 105, 51; 115, 42; 125, 33; 135, 9; 145, 2; 155, 1
C. 60-70, 2; 70-80, 4; 80-90, 12; 90-100, 44; 100-110, 51; 110-120, 42; 120-130, 33; 130-140, 9; 140-150,
2; 150-160, 1
(d) Which class has the highest frequency?
A. 90 99 -
B. 100 109 -
C. 105
D. 100 110 -
(e) Which class has the lowest frequency?
A. 150 159 -
B. 155
C. 150 160 -
D. 60 69 -
(f) What percent of students had an IQ of at least 130?
6 % (Type an integer or a decimal. Do not round.)
(g) Did any students have an IQ of 167?
A. Yes, because there is a bar in the 150-159 class.
B. Yes, because there is a frequency of a score of 165.
C. No, because there is a bar in the 150-159 class.
D. No, because there are no bars, or frequencies, greater than an IQ of 160.
YOU ANSWERED: A.
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