For question 7 refer to the box & whisker graph below that shows how much time w

Question

For question 7 refer to the box & whisker graph below that shows how much time was spent per night on homework for sophomore class at a certain high school during September.

Average Minutes Per Night Spent On Homework

                                0       20                48    60                                                                                              190

a)  What percent of the sophomores spend more than 60 minutes on

                              homework per night?

b)  What is the range of times that the middle 50% of the sophomores

                             spend on homework per night?

c)  What percent of the sophomores spend less than 20 minutes per night

                                on homework?

(The box & whisker are not showing up when I paste and copy the question. The box is above the numbers between the number 20 and 60 and the line inside the box is above the number 48. Hopefully this helps.)

Explanation / Answer

a)

percent of the sophomores spend more than 60 minutes on

                              homework per night =values above 3rd quartile =25%

b)

range of times that the middle 50% of the sophomores

                             spend on homework per night =Q3-Q1 =60-20=40

c)

percent of the sophomores spend less than 20 minutes per night

                                on homework =value less then 1st quartile =25%

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