Brain volume for adult women is about 1,100 cc for women with a standard deviation of 75 cc（normal distrbution） Consider the sample mean of 100 random adult women from this population. Around what is the 95th percentile of the distribution of that sample mean? Express your answer to the nearest cc.

Question

anonymous · Answer

Means are distributed nearly normally, with spread measured by the standard error of the mean, SE = SD/sqrt(n), where SD is the
standard deviation of the readings themselves. 95%tile of the distribution of the means would be near the  mean + 1.65 SE.

anonymous · Answer

That's right ！

anonymous · Answer

Music to my eyes. [Mixed metaphor there.]