the mean change per day to Krista's account in dollars during that week is $14.
In order to determine the mean change per day, the total sum of money in Krista's account has to be determined and divided by the total number of days.
Mean change per day = sum of money in Krista's account / total number of days.
The amount deposited would be added together and the money transferred or withdrawn would be subtracted.
Sum of money in the account = $45 - $30 + $59 -$18 = $56.
Mean change = $56 / 4 = $14
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