48 students were asked to write the total number of hours per week they spent on watching television. With this information find the standard deviation of hours spent on watching television.
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A
1.6
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B
2.6
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C
3.2
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D
3.8
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Solution
The correct option is A 1.6 Mean ¯x=∑xifiN=43248=9 (∵N=∑fi)