Suppose that 20% of the students in a high school have used the library services last semester. If a random sample of 100 students from the school...
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1. Suppose that 20% of the students in a high school have used the library services last semester. If a random

sample of 100 students from the school were selected. Use the normal approximation to the binomial with a correction for continuity to find the following:

a) Find the mean?

b) Find the standard deviation?

c) Find the probability that at most 22 used the library services??

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Mean = 20 standard... View the full answer

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