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Answer:
Mean =13, Median=9, Mode =7, Range=43
Step-by-step explanation:
(1)Mean
<u>Median</u>
First we arrange the sales in ascending order
7,7,7,8,9,9,10,11,12,50
Since there are two terms in the middle, the Median =(9+9)/2 =9
<u>Mode</u>
The mode is the number of sales with the highest frequency.
Mode =7
<u>Range</u>
Range =Highest Value - Lowest value =50-7=43
(b)Mean =13, Median=9, Mode =7, Range=43
The Median seems to best represent the ten numbers. this is as a result of the fact that the value of the Mean and range were affected by the outlier number(50).
The School should therefore order T-Shirts in the range of the Median.