Question

The dot plot below represents the number of dollars in allowance that students receive each week in Mrs. Jimenez’s class. What is the median amount of allowance?

And what is the range of the allowances?

Answer 1

So they get $2 on day 0, $2 on day 2, $3 on day 4, $5 on day 5, $2 on day 6, $1 on day 7, $2 on day 8, $4 on day 10, $1 on day 11, $2 on day 12 and $1 on day 15.

$2 appears 5 times

$1 appears 3 times

$4 appears once and $5 appears once

The median would be ($2*5 + $1*3 + $4 + $5)/(5+3+1+1) = $22/10 = $2.2

The range of the allowances is highest - lowest = $5-$1 = $4

Edit: It might also have a range of $5 and a median of $1.37 because the lowest it goes to is $0 on some days though. Try both.