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Math Help - Standard Deviation - fahrenheit to celsius

  1. #1
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    Standard Deviation - fahrenheit to celsius

    Hi, I have a quick question...

    I have a question, if the mean tempature was -19.3 C and the standard deviation was 2.3 C..... when converting to Fahrenheit mean is easy i get -2.74F but I can't figure out the standard deviation conversion.... any help?
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by googy View Post
    Hi, I have a quick question...

    I have a question, if the mean tempature was -19.3 C and the standard deviation was 2.3 C..... when converting to Fahrenheit mean is easy i get -2.74F but I can't figure out the standard deviation conversion.... any help?
    Convert it just as if it were a temprature.

    RonL
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  3. #3
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    Thanks for the reply.... That was the first thing I tried and I got 36.14F... that wasn't the right answer though... I read on another thing online that you cant convert standard deviation straight from celsious to farenheit... if anyone else has another suggestion i'd appreciate it.
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    Quote Originally Posted by googy View Post
    Hi, I have a quick question...

    I have a question, if the mean tempature was -19.3 C and the standard deviation was 2.3 C..... when converting to Fahrenheit mean is easy i get -2.74F but I can't figure out the standard deviation conversion.... any help?
    We know that the standard deviation is 2.3^o ~C. This represents a change in the temperature, so you are correct that you can't simply use the formula to change the temperature. However you can still use it in the following sense:

    We know that a change in temperature of 100^o ~C corresponds to a change in temperature of 180^o~F. So that's our conversion factor for a change in temperature:
    2.3^o~C \cdot \frac{180^o~F}{100^o~C} = 4.14^o~F

    -Dan
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    Thanks a lot I appreciate the help.. I completely get it now.
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