Question

The numbers of minutes spent in the computer lab by 20 students working on a project

are given below:

Numbers of Minutes

30 | 02556668

40 | 022579

50 | 0135

60 | 13

The median for this data set is

(a) 400.

(b) 402.

(c) 405.

(d) 407.​

Answer 1

Given : The numbers of minutes spent in the computer lab by 20 students working on a project  

To Find   : The median for this data set

40

40.2

40.5

40.7

Solution:

Time           f                   cf

30               8                  8

40               6                  14

50               4                  18

60               2                  20

Median should be mean of 10th and 11th

10th and 11th both spend 40 minutes

Hence Median is 40 Minutes

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