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Statistics, Standard deviation and Correlation in Maths.

  • 02-06-2013 8:27pm
    #1
    LiamGGG
    Registered Users, Registered Users 2 Posts: 17 ✭


    Hey,
    I'm doing ordinary maths and I use a Sharp EL-W531 calculator.
    I'm just wondering when a question asks you to find the standard deviation or correlation coefficient would it be ok to do it in the calculator (following the instructions in the pdf below) than to actually do it out?.
    Like would I be docked marks if i just put down the answer or do I get the marks as long as it's right?.

    http://mrroche.pbworks.com/w/file/fetch/46462777/sharp%20statistics.pdf

    Many thanks,
    Liam.


Comments

  • #2
    Moody_mona
    Registered Users, Registered Users 2 Posts: 1,107 ✭✭✭Moody_mona


    LiamGGG wrote: »
    Hey,
    I'm doing ordinary maths and I use a Sharp EL-W531 calculator.
    I'm just wondering when a question asks you to find the standard deviation or correlation coefficient would it be ok to do it in the calculator (following the instructions in the pdf below) than to actually do it out?.
    Like would I be docked marks if i just put down the answer or do I get the marks as long as it's right?.

    http://mrroche.pbworks.com/w/file/fetch/46462777/sharp%20statistics.pdf

    Many thanks,
    Liam.

    Using your calculator is fine as long as you're sure of the method. Try to estimate your answer first so you have a ball park figure. Write down "by calculator". Ordinary level students do not need to be able to calculate correlation coefficient. You may be asked to estimate correlation coefficient based on graph, you may be given a choice of numbers and asked to identify which is the correlation coefficient of a given graph, or you may be asked to match graphs and correlation coefficients, but not to explicity calculate it.


  • #3
    LiamGGG
    Registered Users, Registered Users 2 Posts: 17 ✭LiamGGG


    Moody_mona wrote: »
    Using your calculator is fine as long as you're sure of the method. Try to estimate your answer first so you have a ball park figure. Write down "by calculator". Ordinary level students do not need to be able to calculate correlation coefficient. You may be asked to estimate correlation coefficient based on graph, you may be given a choice of numbers and asked to identify which is the correlation coefficient of a given graph, or you may be asked to match graphs and correlation coefficients, but not to explicity calculate it.

    Ok, That's great. I'll just learn off the method and I should be fine then.
    Thanks!:)


  • #4
    Acciaccatura
    Registered Users, Registered Users 2 Posts: 428 ✭✭Acciaccatura


    LiamGGG wrote: »
    Hey,
    I'm doing ordinary maths and I use a Sharp EL-W531 calculator.
    I'm just wondering when a question asks you to find the standard deviation or correlation coefficient would it be ok to do it in the calculator (following the instructions in the pdf below) than to actually do it out?.
    Like would I be docked marks if i just put down the answer or do I get the marks as long as it's right?.

    http://mrroche.pbworks.com/w/file/fetch/46462777/sharp%20statistics.pdf

    Many thanks,
    Liam.

    How do you calculate the standard deviation and correlation coefficient on that calculator? I'm never too sure, I keep forgetting and I know it'll catch me out :/


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