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Please help me with

Please help me with-example-1
User Bud
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1 Answer

17 votes
17 votes

Explanation:

it is an equal distribution : every data value has the same frequency of occurrence - 1/14 of all students.

so, 1/14 of her students practice 1 hour, 2 hours, 3 hours, ..., 14 hours.

every hour is represented not just by a line but by a bar one unit thick (going from the hour value to the begin of the next hour value).

so, we have 14 different values for weekly practicing.

and, as mentioned, precisely 1/14 of her students practice one of these hour values for each of these values.

so, the orange shaded part stands for the students that practice 6 or 7 hours per week.

"between 6 and 8 hours" is only correct, if that excludes the end (8 hour) value. otherwise "between 6 and 7 hours" is correct.

bottom line : this is only a 2- hour interval (6 and 7 hours practicing).

and so, this interval stands for 2/14 of all her students.

2/14 = 1/7 = 0.142857143... ≈ 14%

and now the other concern I have : what is the shaded part ? if it is not the orange but the blueish part, then we are talking about all the students except for those that practice 6 or 7 hours per week.

and that would be then 12/14 = 6/7 = 0.857142857... ≈

≈ 86% of her students.