Statistics question!?!?

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Statistics question!?!?

The probability that an individual is left-handed is 0.13. In a class of 70 students, what is the mean and standard deviation of left-handers in the class?

2007-05-04 07:48:59 · 2 answers · asked by dAZED&cONFUSED 2 in Science & Mathematics ➔ Mathematics

2 answers

mean=.13*70=9.1
std= sqrt(70*.13*.87)=2.813

2007-05-04 07:56:23 · answer #1 · answered by bruinfan 7 · 0⤊ 0⤋

Well the mean would be 9.1 (round to 9, or I guess possibly 10 as you will). Can't remember how to calculate standard dev for this.

2007-05-04 14:54:54 · answer #2 · answered by dunny456 2 · 0⤊ 0⤋