Turn on thread page Beta
    • Thread Starter
    Offline

    0
    ReputationRep:
    Hello! I need a bit of urgent help on this question (my exam is next week). The question is from Jan 2005 S4 paper (AQA spec B). I can do (a) which is simple, but the rest is :confused: My teacher doesnt know the answer so can someone help me out please. Lets see who can beat my teacher (im sure theres loads of you!)

    4. Sharon is considering opening a coffee bar. while preparing her business plan, she estimated that a customer will, on average, occupy a seat in the coffee bar for 18 minutes.

    she observed customers in a coffee bar in a similar area and recorded the times, in minutes, for which they occupied a seat. the times recorded were as follows:

    37.4 18.2 39.0 12.2 46.9 5.4 69.2 16.3 44.6 24.2 39.8

    (a) Using the 5% significance level, test teh hypothesis that the mean time a customer occupies a seat is 18 minutes. Assume that the data are a random sample from a normal distribution.

    (b) If, in part (a), you had been asked to examine whether the mean time a customer occupied a seat was less than 18 minutes, state the changes, if any, which would have been necessary to:
    (i) the null hypothesis;
    (ii) the alternative hypothesis;
    (iii) the critical value(s);
    (iv) the conclusion. Your conclusion should be stated in words; i.e. a conclusion such as "reject Ho" is not sufficient.

    (c) If, in part (a), you had been asked to examine a claim that the mean time a customer occupied a seat was 18 minutes or less , state the changes, if any, which would have been necessary to:
    (i) the null hypothesis;
    (ii) the alternative hypothesis;
    (iii) the critical value(s);
    (iv) the conclusion. Your conclusion should be stated in words; i.e. a conclusion such as "reject Ho" is not sufficient.

    Thankyou in advance :tsr:
 
 
 
Turn on thread page Beta
Updated: June 10, 2005

University open days

  • University of Lincoln
    Mini Open Day at the Brayford Campus Undergraduate
    Wed, 19 Dec '18
  • University of East Anglia
    UEA Mini Open Day Undergraduate
    Fri, 4 Jan '19
  • Bournemouth University
    Undergraduate Mini Open Day Undergraduate
    Wed, 9 Jan '19
Poll
Do you have any savings?
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

Equations

Best calculators for A level Maths

Tips on which model to get

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.