See all my videos at http://www.zstatistics.com/videos/ 0:15 Introduction 1:30 Pre-requisites/assumptions 2:36 Calculating by hand 8:56 Calculating using Excel 12:05 Expected value and standard deviation EXAMPLE USED: Studies show colour blindness affects about 8% of men. A random sample of 10 men is taken. Find the probability that: (a) All 10 men are colour blind (b) No men are colour blind (c) Exactly 2 men are colour blind (d) At least 2 men are colour blind (e) The expected number of colour blind men in the sample (f) The standard deviation of the number of colour blind men in the sample.