Concept explainers
(a)
To discuss: the information that can collect from the histogram.
(a)
Explanation of Solution
Given information:
The histogram shows the number of minutes students spend on the internet in one day.
The horizontal axis represent the number of minutes spent by student on internet in one day, and the vertical axis represent number of students. The height of the bars represent frequency for each classes. Therefore, count the height of all bars to find the total number of students. For example, 6 students who spend 11-20 minutes on internet in a day. There are in total 75 students in different time interval. Using the total number of students and frequency in each interval, one can compute percentage of students who spend more than 50 minutes on internet. The required percentage is as follows:
(b)
Whether the measurement of central tendency from the histogram could be found.
(b)
Answer to Problem 9PPS
NO
Explanation of Solution
Exact number of students is not listed; one cannot find any measure of central tendency.
For measure of central tendency exact number of students is needed.
Chapter 13 Solutions
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