[問題]GWD29-18

[magic]

Q18:
A scientist recorded the number of eggs in each of 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 of eggs.
答案是B
可是我絕得是E耶
可以請大大們教一下嗎

[kwtluck]

[條件一]給平均數但沒有給各nests的eggs數, 所以無法求標準差
[條件二]已給各個nests的eggs數相等,所以平均數與eggs數相等
,可得知標準差為"0"

[magic]

謝謝大大阿