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29 Mar 2018, 23:37
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
75%
(hard)
Question Stats:
56% (02:55) correct
44%
(02:47)
wrong
based on 128
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Not Attempted Yet
The line plot shows the minutes waited in line by 20 customers at a coffee shop. What is the difference, in minutes, between the median and the mean of the data?
(A) 0 8.
(B) 0 2.
(C) 0
(D) 0.2
(E) 0.8
Attachment:
2018-03-30_1036.png [ 21.51 KiB | Viewed 2834 times ]
Updated on: 30 Mar 2018, 03:46
Originally posted by GMATBusters on 30 Mar 2018, 00:28.
Last edited by GMATBusters on 30 Mar 2018, 03:46, edited 1 time in total.
Last edited by GMATBusters on 30 Mar 2018, 03:46, edited 1 time in total.
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Total number of customers = no of points =20.
Median = mean of 10th and 11 th value = (14+15)/2 =14.5
Mean =(5*1+8*2+10*2+12*1+13*2+14*2+15*5+17*2+19*2+20*1)/20 =13.7
Difference between median and mean = 14.5-13.7 = 0.8
Answer E
Posted from my mobile device
Median = mean of 10th and 11 th value = (14+15)/2 =14.5
Mean =(5*1+8*2+10*2+12*1+13*2+14*2+15*5+17*2+19*2+20*1)/20 =13.7
Difference between median and mean = 14.5-13.7 = 0.8
Answer E
Posted from my mobile device
30 Mar 2018, 00:30
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Bunuel
median = 14+15/2 = 14.5
mean = (5+16+20+12+26+28+75+34+38+20)/20=13.7
0.8
