Turn on thread page Beta
    • Thread Starter

    Trying to conduct a hypothesis test comparing the proportion of people that prefer one brand to another. 47% of people prefer brand A, 45% of people prefer B, and 8% have no preference. Sample size is 400. X denotes number of people that prefer A, and Y denotes number of people that prefer B.

    I have null-hypothesis: p=0.5, where p is probability that an individual prefers A to B (conditional on the fact they have a preference) , and alternative is p does not equal 0.5.

    I think that X (and Y) have a binomial distribution, X ~ Bin (400, 0.5) under the null-hypothesis.

    I'm not too sure what hypothesis test to use, and thereby calculate the p-value.

    • Thread Starter

    Bump, please!!
Submit reply
Turn on thread page Beta
Updated: March 17, 2011
“Yanny” or “Laurel”
Useful resources

Make your revision easier


Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here


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