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fdgSADSDGA31241235 A walk-in clinic for emergency room services maintains records of the number of patients it...

fdgSADSDGA31241235

A walk-in clinic for emergency room services maintains records of the number of patients it treats per day. The following table shows the frequency of the patient arrivals over the course of a 141-day period.

Number of patients per day

Frequency

20 -39

12

40 - 59

22

60 - 79

24

80 - 99

51

100 -119

32

  1. a.Calculate the approximate average number of patients per day
  2. b.Calculate the approximate variance and standard deviation of the number of patients per day.

Math   Statistics-And-Probability   
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TOPIC:Finding the mean and standard deviation from the given grouped frequency data.

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