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Consider the grouped frequency distribution below, in which the speed (in km/hr) of 40 cars are presented. Freq, f Midpoint, Class fm fm? Cum. Freq (km/hr) m 80 < 100 4 100 < 120 9 120 < 140 13 140 < 160 9 160 < 180 5 90 360 32400 4 110 108900 13 130 1690 26 202500 s 144500 40 Σfm2 1350 170 850 40 Σfm --- --- The value of Efm² is: A. 516000 O B. 697000 O C. 708000 O D. 724000

Consider the grouped frequency distribution below, in which the speed (in km/hr) of 40 cars are presented. Freq, f Midpoint, Class fm fm? Cum. Freq (km/hr) m 80 < 100 4 100 < 120 9 120 < 140 13 140 < 160 9 160 < 180 5 90 360 32400 4 110 108900 13 130 1690 26 202500 s 144500 40 Σfm2 1350 170 850 40 Σfm --- --- The value of Efm² is: A. 516000 O B. 697000 O C. 708000 O D. 724000

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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Consider the grouped frequency distribution below, in which the speed (in km/hr) of 40 cars are presented. Freq, f Midpoint, Class fm fm2 Cum. Freq (km/hr) m 80 < 100 4 90 360 32400 4 100 < 120 9 120 < 140 13 140 < 160 9 160 < 180 5 110 108900 13 130 1690 Q 26 202500 s 144500 40 Σfm2 R 1350 170 850 40 Σfm --- --- The value of Efm² is: O A. 516000 B. 697000 O .708000 O D. 724000
Transcribed Image Text:Consider the grouped frequency distribution below, in which the speed (in km/hr) of 40 cars are presented. Freq, f Midpoint, Class fm fm2 Cum. Freq (km/hr) m 80 < 100 4 90 360 32400 4 100 < 120 9 120 < 140 13 140 < 160 9 160 < 180 5 110 108900 13 130 1690 Q 26 202500 s 144500 40 Σfm2 R 1350 170 850 40 Σfm --- --- The value of Efm² is: O A. 516000 B. 697000 O .708000 O D. 724000
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