# SOLUTION: Hi I am at a roadblock with this question......Determine the mean and the standard deviation of the folowing frequency distribution Class Frequency

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 Click here to see ALL problems on absolute-value Question 43542: Hi I am at a roadblock with this question......Determine the mean and the standard deviation of the folowing frequency distribution Class Frequency 0 to 5 2 5 up to 10 7 10 up to 15 12 15 up to 20 6 20 up to 25 3 Thanks so much for helping meAnswer by stanbon(60777)   (Show Source): You can put this solution on YOUR website!I am at a roadblock with this question......Determine the mean and the standard deviation of the folowing frequency distribution Class Frequency 0 to 5 2 The "classmark" is 2.5 5 up to 10 7 The "classmark" is 7.5 10 up to 15 12 The "classmark" is 12.5 15 up to 20 6 The "classmark" is 17.5 20 up to 25 3 The classmark is 22.5 To find the mean, multiply each classmark by its class frequency. Then divide by the sum of the frequencies. to get: mean = 12.66666... Hopefully you know how to calculate the standard deviation. standard deviation = 5.331... Cheers, Stan H.