![The number of years spent by 400 graduating students in a program before graduation is shown below. [4 Marks] Years Number of](http://img.homeworklib.com/questions/59b60900-cd2d-11eb-971d-ddbaa7e05391.png?x-oss-process=image/resize,w_560)
Homework Answers
Ans:
Total number of observations,n=155+107+76+62=400
Position of P65 i.e. 65 percentile is=400*0.65=260
So,P65 falls in the interval 3-4 years,as 155+107=262
As,260 is little less than 262,so P65 should be approximately 3.98
Correct option is 3.98
| Years | students | prob. | Cumm. prob. |
| 2-3 | 155 | 0.3875 | 0.3875 |
| 3-4 | 107 | 0.2675 | 0.655 |
| 4-5 | 76 | 0.19 | 0.845 |
| 5-6 | 62 | 0.155 | 1 |
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