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Math Help - Mean and Range

  1. #1
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    Mean and Range

    I've got a maths exam next week and i need to know how to work this question out for my revision so please could u show me:

    (a) From 5th May 2000 to 5th May 2001 a swimming club had the same members. Complete the table to show information about the ages of these members:

    Mean (5fh May 2000) - 24 years 3 months
    Range (5th May 2000) - 4 years 8 months
    Mean (5th May 2001) - ........................
    Range (5th May 2001 - ........................

    (b) Mean - 17 years 5 months
    Range - 2 years 0 months

    A new member, aged 18 years 5 months is going to join the club.
    What will happen to the mean age of the members?
    What is the correct state ment?
    It will increase by more than 1 year.
    It will increase by exactly 1 year.
    It will increase by less than a year.
    It will stay the same.
    It's not possible to tell.

    Please can you show your working to all the questions please so that i understand it.
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  2. #2
    MHF Contributor
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    Quote Originally Posted by molly View Post
    (a) From 5th May 2000 to 5th May 2001 a swimming club had the same members. Complete the table to show information about the ages of these members:

    Mean (5fh May 2000) - 24 years 3 months
    Range (5th May 2000) - 4 years 8 months
    Mean (5th May 2001) - ........................
    Range (5th May 2001 - ........................
    You may be in trouble.

    Mean: What happens to peoples' age every year? "+1"
    Range: Why would the range change?

    (b) Mean - 17 years 5 months
    Range - 2 years 0 months

    A new member, aged 18 years 5 months is going to join the club.
    What will happen to the mean age of the members?
    What is the correct state ment?
    It will increase by more than 1 year.
    It will increase by exactly 1 year.
    It will increase by less than a year.
    It will stay the same.
    It's not possible to tell.
    There is no working. These are eyeball questions.

    Mean: The new member is older than the mean age. Wouldn't that increase the mean?
    Mean: The precise increase depends on the number of members. Insufficient information.
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