Question

The box plot shows the number of hours 220 people spent at a computer on a weekend. about how many people spend more than 6 hours at a computer?
A. 165
B. 110
C. 55
D. 75

Answer 1

It has been to us that there are a total number of 220 people.

The box plot has been shown to us. We know that in a box plot from the Lower Quartile to the Median the data is 25% of the total amount of data. Likewise, from the Median to the Upper Quartile it is 25% again and from the Upper Quartile to the last data. It is again 25%.

Now, as per the box plot given to us, 6 hours is the Lower Quartile, therefore, more than 6 hours at the computer will have 25%+25%+25%=75% of the total people. The number of total people is 220. Therefore, the number of people who spend more than 6 hours at a computer will be:

75% of 220=$\frac{75}{100}\times 220=165$

Thus, Option A is the correct option.