Hey there! Sign in to join this conversationNew here? Join for free
x Turn on thread page Beta
    • Thread Starter
    Offline

    0
    ReputationRep:
    7. A teacher thinks that 20% of the pupils in a school read the Deano comic regularly.
    He chooses 20 pupils at random and finds 9 of them read the Deano.
    (a) (i) Test, at the 5% level of significance, whether or not there is evidence that the
    percentage of pupils that read the Deano is different from 20%. State your
    hypotheses clearly.
    (ii) State all the possible numbers of pupils that read the Deano from a sample of size 20
    that will make the test in part (a)(i) significant at the 5% level.
    For part ii, i made two equations as i thought it was a two tailed test.
    I did p(x<=1-c)=>0.975 and p(x<=c)<=0.025
    my answers were wrong. Can someone tell me where i went wrong and the correct steps?
    Offline

    1
    ReputationRep:
    (Original post by MIKE ESSIEN IS QUITE SICK)
    ..
    Post more of your working and I'll look for flaws.
    • Thread Starter
    Offline

    0
    ReputationRep:
    (Original post by Clarity Incognito)
    Post more of your working and I'll look for flaws.
    i found out that in the markscheme they didnt treat it as two tail but the question is implying that we should find if probabiltiy is DIFFERANT(which i thought would mean two tail).
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: January 18, 2010
Poll
Do you agree with the proposed ban on plastic straws and cotton buds?
Useful resources

Make your revision easier

Maths

Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

Equations

How to use LaTex

Writing equations the easy way

Student revising

Study habits of A* students

Top tips from students who have already aced their exams

Study Planner

Create your own Study Planner

Never miss a deadline again

Polling station sign

Thinking about a maths degree?

Chat with other maths applicants

Can you help? Study help unanswered threads

Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.