don't understand the answer

debbie394

can someone explain to me why this is the answer to question 8 iv)

http://mei.org.uk/files/papers/jgygoiufr5n.pdf

Reply 1

Lemur14

Volunteer Section Leader

Original post by esmeralda123

can someone explain to me why this is the answer to question 8 iv)

http://mei.org.uk/files/papers/jgygoiufr5n.pdf

What about it don't you understand?
It's binomial probability, testing to see the maximum number of appointments that can be booked while still having a 90% chance of all the patients who turn up still being able to be seen :smile:

Reply 2

debbie394

Original post by Lemur14

whne doing the binomial probability what power would you put 0.2 to?
how many powers can test for 0.2 before moving to n=18, n=19

Reply 3

Lemur14

Volunteer Section Leader

Original post by esmeralda123

whne doing the binomial probability what power would you put 0.2 to?
how many powers can test for 0.2 before moving to n=18, n=19

0.2 goes to the power of x
You're testing to see if you can book 18 appointments while only having 16 turn up, so you test up to x=2 for 18, and up to x=3 for 19.