Year 12s: what will be the first way you research your future options? >>

maths aid needed u will be rewarded!

An insurance company knows from previous records that the probability of
a person in a particular age-group dying in the next year is 0.7.
It has 23 policy holders who fall into this age range. What is the probability that
the company will receive the following number of claims in the next year as a result
of deaths within this group?
Give your answers to 2 decimal places
ev
(a) more than one claim 1 mark

(b) less than 7 claims 1 mark

(c) exactly 4 claims 1 mark

(d) 3 to 5 claims inclusive 2 marks

Reply 1

SCE1912

Let X be the number of deaths in the group
What distribution do you think X will have (given certain assumptions)?

Reply 2

LozengeC

Is this binomial? If so you could use the tables? Or is that only when you're disproving a hypothesis? Or is that T-test? I only did stats 2 years ago, you think I'd still remember! :p:

Reply 3

rishi08

SCE1912

Let X be the number of deaths in the group
What distribution do you think X will have (given certain assumptions)?

um i have no idea, its a q from distributions and im reely struggling and i gotta do it by today lol, save me!

Reply 4

rishi08

LozengeC

Is this binomial? If so you could use the tables? Or is that only when you're disproving a hypothesis? Or is that T-test? I only did stats 2 years ago, you think I'd still remember! :p: