The median for brand X is 17.
The median for brand Y is 9.
The median for brand X is greater than that of brand Y by 8.
The range for brand Y is 6. It shows that the spread of the brand is 6.
If Mary bought 12 of the Brand X batteries, the number that lasted less than 15 hours is 3.
What are the median values?
A box plot is used to study the distribution and level of a set of scores. The box plot consists of two lines and a box. The end of the first line represents the minimum number and the end of the second line represents the maximum number.
On the box, the first line to the left represents the lower (first) quartile. The next line on the box represents the median. The third line on the box represents the upper (third) quartile.
Range of brand y = 12.5 - 6.5 = 6
Batteries that lasted less than 15 hours = 25% x 12
0.25 x 15 = 3
25% is used because 15 is the value of the first quartile.
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