The following frequency distribution provides a certain condition prevalence fre

Question

The following frequency distribution provides a certain condition prevalence frequency distribution for 63 regions a. Determine the number of outcomes (regions) that constitute the event (not C). Event (not C) has regions Condition (%) 4 - under 5 5- under 6 6 under 7 7- under 8 8- under 9 9-under 10 Frequency 9 13 19 10 4 2 10 -under 11 A= event that has a prevalence of at least 8% B-event that has a prevalence of less than 7% C= event that has a prevalence of at least 5% but less than 10% D= event that has a prevalence of less than 9%

Explanation / Answer

Total of outcomes (regions) = 63

number of outcomes that constitute the event (not C) = Total of outcomes -  number of outcomes that constitute the event C

C = event that has prevalance of atleast 5% and but less than 10%

number of outcomes that constitute the event C = no of outcomes with (5 - under 6) + no of outcomes with (6 - under 7) + no of outcomes with (7 - under 8) + no of outcomes with (8 - under 9) + no of outcomes with (9 - under 10)

= 13 + 19 + 10 + 6 + 4 = 52

number of outcomes that constitute the event (not C) = 63 - 52 = 11

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