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# Find the mean of the data.

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Manager
Joined: 26 Dec 2018
Posts: 144
Location: India
Find the mean of the data.  [#permalink]

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15 Jan 2019, 08:21
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Difficulty:

15% (low)

Question Stats:

95% (00:13) correct 5% (00:07) wrong based on 30 sessions

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Find the mean of the data.

1. The data has 8 data values

2. The data is 3, 4, 5, 6, 4, 1, 0, 5

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examPAL Representative
Joined: 07 Dec 2017
Posts: 1140
Re: Find the mean of the data.  [#permalink]

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15 Jan 2019, 10:27
in order to find the mean, we need the number of values (n) and the actual values.

A - no data on the actual values - insufficient!
B - both the actual values and the number of values (just count them) - sufficient!
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Senior Manager
Joined: 12 Jan 2019
Posts: 263
Re: Find the mean of the data.  [#permalink]

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15 Jan 2019, 21:45
When we arrange data in increasing order, middle value is the mean.

Statement 1; doesn't tell us what middle value might be. Thus insufficient.

Statement 2: give us all the data. Here if we arrange increasing order, 0,1,3,4,4,5,5,6
We can clearly see, 4 is middle value and thus mean.
Thus it is sufficient.

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GMAT Tutor
Joined: 07 Nov 2016
Posts: 56
GMAT 1: 760 Q51 V42
Re: Find the mean of the data.  [#permalink]

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15 Jan 2019, 22:53
UdayPratapSingh99 wrote:
When we arrange data in increasing order, middle value is the mean.

Statement 1; doesn't tell us what middle value might be. Thus insufficient.

Statement 2: give us all the data. Here if we arrange increasing order, 0,1,3,4,4,5,5,6
We can clearly see, 4 is middle value and thus mean.
Thus it is sufficient.

Posted from my mobile device

Correction : middle value is the median and not the mean

Mean = $$\frac{Sum of Values}{number of values}$$
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Re: Find the mean of the data.   [#permalink] 15 Jan 2019, 22:53
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