Question

A recent study has shown that 28% of 18-34 year olds check their Facebook/Instagram feeds before getting out of bed in the morning,

If we sampled a group of 150 18-34 year olds, what is the probability that the number of them who checked their social media before getting out of bed is:

a.) At least 31?

b.) No more than 52?

c.) between 36 and 44 (including 36 and 44)?

Use the Normal Approximation to the Binomial distribution to answer this question.

Answer 1

The following information about the Binomial distribution is provided:

The population proportion of success is p=0.28, and the sample size is n=150.

The population mean is computed as:

and the population standard deviation is computed as:

a)

b)

c)

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