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). IQs of 7th Grade Students 80- 60- 40- 20- 60 70 80 90 100 110 120 130 140 150 160 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. 60-70, 1; 70-80, 4; 80-90, 13; 90-100, 49; 100-110, 46; 110-120, 42; 120-130, 33; 130-140, 8; 140-150, 2; 150-160, 2 O B. 65, 1; 75, 4; 85, 13; 95, 49; 105, 46; 115, 42; 125, 33; 135, 8; 145, 2; 155, 2 Oc. 60-69, 1; 70-79, 4; 80-89, 13; 90-99, 49; 100-109, 46; 110-119, 42; 120-129, 33; 130-139, 8; 140-149, 2; 150-159, 2 (d) Which class has the highest frequency? O A. 95 O B. 100-109 O c. 90-99 O D. 90-100
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). IQs of 7th Grade Students 80- 60- 40- 20- 60 70 80 90 100 110 120 130 140 150 160 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. 60-70, 1; 70-80, 4; 80-90, 13; 90-100, 49; 100-110, 46; 110-120, 42; 120-130, 33; 130-140, 8; 140-150, 2; 150-160, 2 O B. 65, 1; 75, 4; 85, 13; 95, 49; 105, 46; 115, 42; 125, 33; 135, 8; 145, 2; 155, 2 Oc. 60-69, 1; 70-79, 4; 80-89, 13; 90-99, 49; 100-109, 46; 110-119, 42; 120-129, 33; 130-139, 8; 140-149, 2; 150-159, 2 (d) Which class has the highest frequency? O A. 95 O B. 100-109 O c. 90-99 O D. 90-100
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Transcribed Image Text: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).
IQs of 7th Grade Students
80+
60-
49 46
42
33
40-
13
4.
20-
8.
2 2
0-
60 70 80 90 100 110 120 130 140 150 160
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.
А. 60-70, 1; 70-80, 4;B 80-90, 13; 90-100, 49; 100-110, 46;B 110-120, 42;B 120-130, 3;B 130-140, 8; 140-150, 2; 150-160, 2
В. 65, 1; 75, 4; 85, 13; 95, 49; 105, 46;B 115, 42;B 125, 33; 135, 8; 145, 2;B 155, 2
С. 60-69, 1; 70-79, 4;B 80-89, 13;B 90-99, 49;B 100-109, 46;B 110-119, 42; 120-129, 33; 130-139, 8; 140-149, 2;B 150-159, 2
(d) Which class has the highest frequency?
Α. 95
В. 100-109
С. 90-99
D. 90-100
Frequency
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