Question 1
1.1 A discrete random variable can be described by the binomial distribution if it satisfies four conditions. State these conditions
1.2 A section committee consisting of 10 members is to be formed from a group of 20 employees at a firm. Of the 20 employees, twelve are female. Calculate the probability that at most B committee member will be female.
1.3 State four properties of the normal distribution function
1.4 The mean monthly salary of the employees of a local salary is R.4500. Assuming that the salaries are approximately normally distributed with a standard devotion of 6500, approximately what percentage of these workers earn monthly salaries in access of 6000?
Question 2
x- values ; 2,6,11,13,15
y- values ; 12, 8, 7,4 2
5.1) draw a scatter diagram depicting the data.
5.2) calculate Pearson''s correlation coefficient.
5.3) Determine the linear regression equation.