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The line plot shows the minutes waited in line by 20 customers at a co

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The line plot shows the minutes waited in line by 20 customers at a co  [#permalink]

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New post 29 Mar 2018, 23:37
00:00
A
B
C
D
E

Difficulty:

  65% (hard)

Question Stats:

52% (03:11) correct 48% (03:04) wrong based on 35 sessions

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The line plot shows the minutes waited in line by 20 customers at a co  [#permalink]

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New post Updated on: 30 Mar 2018, 03:46
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

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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.
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Re: The line plot shows the minutes waited in line by 20 customers at a co  [#permalink]

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New post 30 Mar 2018, 00:30
Bunuel wrote:
Image
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



median = 14+15/2 = 14.5

mean = (5+16+20+12+26+28+75+34+38+20)/20=13.7

0.8
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Re: The line plot shows the minutes waited in line by 20 customers at a co  [#permalink]

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New post 30 Mar 2018, 00:34
gmatbusters wrote:
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 A

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0.8 is option E

check again
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Re: The line plot shows the minutes waited in line by 20 customers at a co  [#permalink]

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New post 30 Mar 2018, 03:47
That was a typo, thanks for pointing out.

Hatakekakashi wrote:
gmatbusters wrote:
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 A

Posted from my mobile device


0.8 is option E

check again


Posted from my mobile device
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Re: The line plot shows the minutes waited in line by 20 customers at a co   [#permalink] 30 Mar 2018, 03:47
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