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A survey was conducted to determine, on average, how long patients have to wait to see...

A survey was conducted to determine, on average, how long patients have to wait to see a doctor. The number of patients that ended up waiting up to 2 hours to see a doctor, recorded in 10-minutes intervals, is given in the table below. Calculate the standard deviation for this distribution. Explain what it means in the context of this problem.

Waiting time(mins)

 10 20 30 40 50 60 70 80 90 100 110 120
Frequency of Occ. 1 4 15 20 35 42 28 19 13 5 2 1
Math   Statistics-And-Probability   
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