The data was collected on the time spent for preparation of exams by a class of statistics students before one week of examination data. The maximum time of study time was 47 hours and minimum time was 1 hour. If the data is roughly symmetric, what is the standard deviation of the data. a) b) c) 11.5 5 10.5 Cannot determine.
Answers
Given : The data was collected on the time spent for preparation of exams by a class of statistics students before one week of examination data.
The maximum time of study time was 47 hours and minimum time was 1 hour.
If the data is roughly symmetric,
To Find : what is the standard deviation of the data. a) b) c) 11.5 5 10.5 Cannot determine.
Solution:
Range - max - min
= 47 - 1
= 46
Using empirical formula If the data is roughly symmetric,
Range = 4 * SD
=> 46 = 4 * SD
=> SD = 11.5
If the data is roughly symmetric, the standard deviation of the data.
is 11.5
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