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- 40- 20 13 60 70 80 90 100 110120 130 140 150 160 IO scores (e) Which class has the lowest frequency? O A. 65 O B. 60-70 O C. 60-69 O D. 150-159 (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 161? O A. Yes, because there is a bar in the 150-159 class. O B. No, because there are no bars, or frequencies, greater than an IQ of 160. O C. Yes, because there is a frequency of a score of 165. O D. No, because there is a bar in the 150-159 class.
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- 40- 20 13 60 70 80 90 100 110120 130 140 150 160 IO scores (e) Which class has the lowest frequency? O A. 65 O B. 60-70 O C. 60-69 O D. 150-159 (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 161? O A. Yes, because there is a bar in the 150-159 class. O B. No, because there are no bars, or frequencies, greater than an IQ of 160. O C. Yes, because there is a frequency of a score of 165. O D. No, because there is a bar in the 150-159 class.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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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.
22
60 70 80 90 100 110 120 130 140 150 160
IQ scores
.....
(e) Which class has the lowest frequency?
O A. 65
В. 60-70
О с. 60-69
D. 150-159
(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 161?
O A. Yes, because there is a bar in the 150-159 class.
B. No, because there are no bars, or frequencies, greater than an IQ of 160.
O C. Yes, because there is a frequency of a score of 165.
O D. No, because there is a bar in the 150-159 class.
Frequency
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