What proportion of students studied more than 4 hours?
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Question

Transcribed Image Text:A sociologist studying freshmen carried out a survey, asking, among other questions, how often students went out per
week, how many hours they studied per day, and how many hours they slept at night. The given table provides the answers
on the time slept and the time spent studying.
Hours/day
studied
Less than 6
hours slept
6 to 8 hours
More than 8
Total
slept
hours slept
Less than 2
20
40
20
80
2 to 3
10
30
10
50
3 to 4
20
20
20
60
More than 4
20
20
10
50
Total
70
110
60
240
What proportion of students studied more than 4 hours?
O 0.67
O 0.21
0.46
0.25
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