following pency hist sample eventn-grade stude ured to the nearest whoie umber. The frequency of each class is labeled above each rectangle. Use the histogram to answers parts (a) through (g). 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, 52; 100-110, 44: 110-120, 41: 120-130, 32; 130-140, 7; 140-150, 4; 150-160, 2 O B. 60-69, 1; 70-79, 4; 80-89, 13; 90-99, 52; 100-109, 44; 110-119, 41; 120-129, 32; 130-139, 7; 140-149, 4; 150-159, 2 OC. 65, 1; 75, 4; 85, 13; 95, 52; 105, 44; 115, 41; 125, 32; 135, 7; 145, 4; 155, 2 d) Which class has the highest frequency? DA. 90-100 ОВ. 100-109 с. 90-99 D D. 95 e) Which class has the lowest frequency? DA. 60-69 О В. 150-159 OC. 60-70 O D. 65

following pency hist sample eventn-grade stude ured to the nearest whoie umber. The frequency of each class is labeled above each rectangle. Use the histogram to answers parts (a) through (g). 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, 52; 100-110, 44: 110-120, 41: 120-130, 32; 130-140, 7; 140-150, 4; 150-160, 2 O B. 60-69, 1; 70-79, 4; 80-89, 13; 90-99, 52; 100-109, 44; 110-119, 41; 120-129, 32; 130-139, 7; 140-149, 4; 150-159, 2 OC. 65, 1; 75, 4; 85, 13; 95, 52; 105, 44; 115, 41; 125, 32; 135, 7; 145, 4; 155, 2 d) Which class has the highest frequency? DA. 90-100 ОВ. 100-109 с. 90-99 D D. 95 e) Which class has the lowest frequency? DA. 60-69 О В. 150-159 OC. 60-70 O D. 65

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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Concept explainers

Bar Graphs

A bar graph is a chart or graphical representation of data. A bar chart, also known as a bar graph, is a graph or chart that displays categorical data using rectangular bars with heights or lengths equal to the values they represent. Typically, bar graphs show categorical and numerical variables grouped in class intervals. A bar graph is useful for comparing and analyzing a set of data.

Question

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).
(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, 52; 100-110, 44; 110-120, 41; 120-130, 32; 130-140, 7; 140-150, 4; 150-160, 2
O B. 60-69, 1; 70-79, 4; 80-89, 13; 90-99, 52; 100-109, 44; 110-119, 41; 120-129, 32; 130-139, 7; 140-149, 4; 150-159, 2
O C. 65, 1; 75, 4; 85, 13; 95, 52; 105, 44; 115, 41; 125, 32; 135, 7; 145, 4; 155, 2
(d) Which class has the highest frequency?
O A. 90-100
O B. 100-109
OC. 90-99
O D. 95
(e) Which class has the lowest frequency?
O A. 60-69
O B. 150-159
OC. 60-70
O D. 65

IQs of 7th Grade Students
80-
60-
52
44
41
40-
32
20-
13
4
4
0-
60
70
80
90
100
150
110
IQ scores
120
130
140
160
2.

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