math

can you please check my work.
The time in minutes that it took five students to complete the math test was 45, 27, 30, 25, and 48. What is the mean absolute deviation of the times?

I did 25+27+30+45+48= 175
then I divided it by the 5 students. 175/5= 35
so now I did the absolute value of 25-35=10
27-35=8, 30-35=5, 45-35=10
and 48-35=13
I add the results 10+8+5+10+13=46
46/5 ( the 5 students)= 9.2 being the MAD

Then they asked what conclusion can you make from the mad value you found?
I am not sure of this but I said the MAD of 9.2 is lower than the mean, median and mode, but I am not sure if that is what they are looking for.

Thanks for checking my work!

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asked by sara
  1. careful with the notation:

    A statement such as 25-35 = 10 is incorrect , you have to say
    |25-35| = 10

    that is where the "absolute" part of the definition comes in.
    Your arithmetic is fine.

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    posted by Reiny
  2. Thank you, I know I didn't know what symbol to use for absolute value, that is why I said I did the absolute value of...,
    but what are they asking for in the second part when asking What conclusion can you make from the mad value you found?
    I am not sure what they want.
    Thank you for your help.

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    posted by sara

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