Need Help With A A Level Statistics QuestionWatch
if any mathematicians doing Statistics 2 unit for edexcel could help me out that would be great since i ve found this problem that's driving me mental
to find it look in Statistics 2 (Heineman book) page 35 question 4 part d
A bakery claims that a pack of 10 of their teacakes contains on average 75 currants.
a) Suggest a distribution thqt could be used to model the number of currants in a randomly selected teacake. State any assumptions that must be made for the model to be valid.
b) Specify the value of any parameters
c)Show that the probability that a randomly selected teacake contains more than 7 currants is 0.475
d)Calculate the probability that in a pack of 10 teacakes at least 2 teacakes contain more than 7 currants. ( this was the one i couldn't do!)
the answer for part d in the book says 0.984 how on earth do you get that!
Can you do it from here ?
can i not use poisson?
thank you so much