(a) Explain briefly what you understand by the terms
population,
sample.
(b) Giving a reason for each of your answers, state whether you would use a census or a sample survey to investigate
the dietary requirements of people attending a 4-day residential course,
the lifetime of a particular type of battery.
The manager of a supermarket receives an average of 6 complaints per day from customers. Find the probability that on one day she receives
(a) 3 complaints,
(b) 10 or more complaints.
The supermarket is open on six days each week.
(c) Find the probability that the manager receives 10 or more complaints on no more than one day in a week.
(4 marks)