A sample analysis of examination results of 500 students was made. It was found that 220 students had failed, 170 had secured a third class, 90 were placed in second class and 20 got a first class. Are there figures commensurate with the general examination result which is in the ratio of 4: 3:21 for the various categories respectively. (The table value of x? for 3 d.f. at 5% level of significance is 7.81).

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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A sample analysis of examination results of
500 students was made. It was found that 220
students had failed, 170 had secured a third
class, 90 were placed in second class and 20
got a first class. Are there figures
commensurate with the general examination
result which is in the ratio of 4: 3:21 for the
various categories respectively. (The table
value of x² for 3 d.f. at 5% level of significance
is 7.81).
Transcribed Image Text:A sample analysis of examination results of 500 students was made. It was found that 220 students had failed, 170 had secured a third class, 90 were placed in second class and 20 got a first class. Are there figures commensurate with the general examination result which is in the ratio of 4: 3:21 for the various categories respectively. (The table value of x² for 3 d.f. at 5% level of significance is 7.81).
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