This question: I point(s) posSible IQs of 7th Grade Students The following frequency histogram represents the IQ scores of a random sample of seventh-grade students. 1Qs are measured to the nearest whole number. The frequency of each class is labeled above each rectangle. Use the histogram to answers parts (a) through (g). A 80+ 60- 511 143401 40- 14 20- 60 70 80 90 10o 110120 130 140 150 160 1Q scores (a) How many students were sampled? students (b) Determine the class width. The class width is (c) Identify the classes and their frequencies. Choose the correct answer below. O A. 60-69, 2; 70-79, 4; 80-89, 14; 90-99, 51; 100-109, 43; 110-119, 40; 120-129, 33; 130-139, 8; 140-149, 4; 150-159, 1 O B. 65, 2; 75, 4; 85, 14; 95, 51; 105, 43; 115, 40; 125, 33; 135, 8; 145, 4; 155, 1 Oc. 60-70, 2; 70-80, 4; 80-90, 14; 90-100, 51; 100-110, 43; 110-120, 40; 120-130, 33; 130-140, 8; 140-150, 4; 150-160, 1 (d) Which class has the highest frequency?
This question: I point(s) posSible IQs of 7th Grade Students The following frequency histogram represents the IQ scores of a random sample of seventh-grade students. 1Qs are measured to the nearest whole number. The frequency of each class is labeled above each rectangle. Use the histogram to answers parts (a) through (g). A 80+ 60- 511 143401 40- 14 20- 60 70 80 90 10o 110120 130 140 150 160 1Q scores (a) How many students were sampled? students (b) Determine the class width. The class width is (c) Identify the classes and their frequencies. Choose the correct answer below. O A. 60-69, 2; 70-79, 4; 80-89, 14; 90-99, 51; 100-109, 43; 110-119, 40; 120-129, 33; 130-139, 8; 140-149, 4; 150-159, 1 O B. 65, 2; 75, 4; 85, 14; 95, 51; 105, 43; 115, 40; 125, 33; 135, 8; 145, 4; 155, 1 Oc. 60-70, 2; 70-80, 4; 80-90, 14; 90-100, 51; 100-110, 43; 110-120, 40; 120-130, 33; 130-140, 8; 140-150, 4; 150-160, 1 (d) Which class has the highest frequency?
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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Problem 1P
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Transcribed Image Text:IQs of 7th Grade Students
The following frequency histogram represents the IQ scores of a random sample of seventh-grade students.
IQs are measured to the nearest whole number. The frequency of each class is labeled above each rectangle.
Use the histogram to answers parts (a) through (g).
80-
60-
51
43 40
33
40-
14.
24
0-
60 70 80 90 100 110 120 130 140 150 160
20-
IQ scores
O B. 95
OC. 90-100
O D. 100-109
(e) Which class has the lowest frequency?
A. 150-160
O B. 155
O C. 150-159
O D. 60-69
(f) What percent of students had an IQ of at least 130?
% (Type an integer or a decimal. Do not round.)
(g) Did any students have an IQ of 168?
O A. Yes, because there is a frequency of a score of 165.
O B. No, because there is a bar in the 150-159 class.
O C. Yes, because there is a bar in the 150-159 class.
O D. No, because there are no bars, or frequencies, greater than an IQ of 160.
O Time Remaining: 03:27:07
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Transcribed Image Text:This question: 1 point(s) possible
IQs of 7th Grade Students
The following frequency histogram represents the IQ scores of a random sample of seventh-grade students.
IQs are measured to the nearest whole number. The frequency of each class is labeled above each rectangle.
Use the histogram to answers parts (a) through (g).
80
-
60-
51
43 40
40-
33
20-
14.
214
60 70 80 90 100 t10 120 130 140 150 160
IQ scores
.....
(a) How many students were sampled?
students
(b) Determine the class width.
The class width is-
(c) Identify the classes and their frequencies. Choose the correct answer below.
O A. 60-69, 2; 70-79, 4; 80-89, 14; 90-99, 51; 100-109, 43; 110-119, 40; 120-129, 33; 130-139, 8; 140-149, 4; 150-159, 1
O B. 65, 2; 75, 4; 85, 14; 95, 51; 105, 43; 115, 40; 125, 33; 135 , 8; 145, 4; 155, 1
OC. 60-70, 2; 70-80, 4; 80-90, 14; 90-100, 51; 100-110, 43; 110-120, 40; 120-130, 33; 130-140, 8; 140-150, 4; 150-160, 1
(d) Which class has the highest frequency?
O A. 90-99
Ов. 95
OC. 90-100
O D. 100-109
(e) Which class has the lowest frequency?
O Time Remaining: 03:27:21
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