Q.

The mean and the SD of 1,2,3,4,5,6 are

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a

72,3512

b

3, 3

c

72,3

d

3,3512

answer is A.

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Detailed Solution

Mean x¯=1+2+3+4+5+66=216=72SD=σ=1n∑i2 −(x¯)2          =16(1+4+9+16+25+36)−494          =916−494=182−14712=3512
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The mean and the SD of 1,2,3,4,5,6 are