1) The time taken by a swimmer in completing several competitions is an example of

a) continous variable

b) discrete variable

c) constant

d) answer not given

2) "Consider the variables x and y , calculate the correlation coefficient where x=9,7,2 and y=3,4,5"

a) 0.971

b) 0.672

c) 0

d) -0.971

3) The normal distribution when plotted obtains a symmetric curve

a) TRUE

b) FALSE

c) Both option a and b

d) answer not given

4) "The probability that a patient recovers from a rare blood disease is 0.4. If 15 people are known to have contracted this disease, what is the probability that at least 10 survive ?"

a) 0.8451

b) 0.2235

c) 0.1245

d) 0.0338