Answered: IQs of 7th Grade Students The following… | bartleby

MATLAB: An Introduction with Applications

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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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).
IQs of 7th Grade Students
80+
58
60-
42
32
411
40-
20-
12
|12
7
32
0-
60 70 80 90 100 110 120 130 140 150 160
IQ scores
.....
(e) Which class has the lowest frequency?
А. 60-70
В. 150-159
О с. 60-69
O D. 65
(f) What percent of students had an IQ of at least 120?
% (Type an integer or a decimal. Do not round.)
(g) Did any students have an IQ of 165?
O A. No, because there are no bars, or frequencies, greater than an IQ of 160.
O B. Yes, because there is a frequency of a score of 165.
C. Yes, because there is a bar in the 150-159 class.
D. No, because there is a bar in the 150-159 class.
Kɔuənbə

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