Statistics Homework Solutions
#3397
Determining the probability using binomial distribution.
The Bell telephone co. surveyed an apartment building with 500 units to find out who subscribes to their service. Turns out 70% of the units use Bell's service.
Find the probability that less than 340 units are using Bell services so we are looking for:
P(X<340)
Z= 340-350/10.25=-0.98
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