hi all i am larry and i am new to this cite i have but one remaining problem to do before my final exam and i am going to be bald before i am done. goes something like this mean and standard deviation wow i can't even find the proper way to write the problem in here i have an x with a line over it =the greek symbol for sigma looks like an e i=1 under the e an n on top of the e and xsub i on the right of the e over the n and second i have s= square root sign top half (numerator) i have n times E(x) and the x is squared -(Ex)and all the parenthacees Ex gets squared and in the denominator we haven(n-1) for the first term in the numerator, square each value of x first then take the sum and multiply by the sample size, n, for the second term in the numerator add the values of x first then square the results lets say the terms are as follows, 219.92,..490.09,...160.30,.... 291.64,...and 298.94. does anyone have any idea how to do this
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a real nightmare of a time
- Thread starter locolarry
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hi all i am larry and i am new to this cite i have but one remaining problem to do before my final exam and i am going to be bald before i am done. goes something like this mean and standard deviation wow i can't even find the proper way to write the problem in here i have an x with a line over it =the greek symbol for sigma looks like an e i=1 under the e an n on top of the e and xsub i on the right of the e over the n and second i have s= square root sign top half (numerator) i have n times E(x) and the x is squared -(Ex)and all the parenthacees Ex gets squared and in the denominator we haven(n-1) for the first term in the numerator, square each value of x first then take the sum and multiply by the sample size, n, for the second term in the numerator add the values of x first then square the results lets say the terms are as follows, 219.92,..490.09,...160.30,.... 291.64,...and 298.94. does anyone have any idea how to do this
Mean and standard deviations are "key-strokes" in scientific calculators. Can you use those - or - do you have to evaluate those by evaluating the equations given to you.
Hello, locolarry,
Not sure exactly what you need in studying for your final. The mean is just an average: add the numbers and divide by however many numbers there are. Standard deviation tells us something about how spread out all the numbers are. For a quick review, try here:
http://en.wikipedia.org/wiki/Standard_deviation
Not sure exactly what you need in studying for your final. The mean is just an average: add the numbers and divide by however many numbers there are. Standard deviation tells us something about how spread out all the numbers are. For a quick review, try here:
http://en.wikipedia.org/wiki/Standard_deviation