Stats Solutions

(See Solution) a) A discrete random variable can be described by the binomial distribution if satisfies four conditions. State these conditions. b) A selection

Question: a) A discrete random variable can be described by the binomial distribution if satisfies four conditions. State these conditions.

b) A selection committee consisting of 10 members is to be formed from a group of 20 employees at a firm. Of the 20 employees, 12 are female. Calculate the probability that at most 8 committee members will be female.

c) State four properties of the normal distribution function.

d) The mean monthly salary of employees at a local library is R 4800 . Assuming that the salaries are normally distributed with a standard deviation of R 500 , approximately what percentage of these workers earn monthly salaries in excess of R 6600 ?

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