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# A scientist recorded the number of eggs in each of the 10

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Director
Joined: 14 Sep 2005
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Location: South Korea
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A scientist recorded the number of eggs in each of the 10 [#permalink]

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19 Dec 2005, 20:06
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A scientist recorded the number of eggs in each of the 10 birds' nests, what was the standard deviation of the numbers of eggs in the 10 nests?

1) The average (arithmetic mean) number of eggs for the 10 nests was 4
2) Each of the 10 nests contained the same number
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VP
Joined: 06 Jun 2004
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Location: CA
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19 Dec 2005, 20:23
I will take (2) for this one. Std. Dev = 0
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Senior Manager
Joined: 05 Oct 2005
Posts: 485
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19 Dec 2005, 20:35
I agree w/ TcHCM, B.

1) No way to find the variance, INSUFF

2) If all the values are the same, st dev. is 0... SUFF
Senior Manager
Joined: 11 Nov 2005
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20 Dec 2005, 17:32

1. insufficient
2. sufficient, STDV =0
20 Dec 2005, 17:32
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