To find the mean transaction amount. We need to understand mean first.
Mean (or average) is a number that expresses the central value in a set of data, which is calculated by dividing the sum of the values in the set by their number of values.
Here, the transactions shown are
$250, -$60, -$94, $300, and -$186. So there are 5 transactions.
Now mean transaction amount is given by:
[tex]\frac{250+(-60)+(-94)+(300)+(-186)}{5} =\frac{250-60-94+300-186}{5}= \frac{210}{5} =42[/tex]
So, the mean transaction amount over 5 transactions is $42.00.
Given
last 5 transactions at Mr. Brigham's ATM were $250, -$60, -$94, $300, and -$186
Find the mean transactions amount
To proof
last 5 transactions were
$250, -$60, -$94, $300, and -$186
FORMULA
mean of values is the ratio of the sum of all values to the number of all values in the set.
[tex]MEAN = \frac{sum \ of \ all \ values}{total \ number \ of \ values}[/tex]
total number of transactions = 5
put all the values in the formula
we get
[tex]MEAN =\frac{250-60-94+300-186}{5}[/tex]
[tex]MEAN = \frac{210}{5}[/tex]
MEAN = $42
mean transactions amount is $42
Hence proved
