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On average, 28 percent of 18 to 34 year olds check their Facebook profiles before getting...

On average, 28 percent of 18 to 34 year olds check their Facebook profiles before getting out of bed in the morning. Suppose this percentage follows a normal distribution with a standard deviation of five percent.

a) Find the probability that the percent of 18 to 34-year-olds who check Facebook before getting out of bed in the morning is at least 36%.

b) Find the 75th percentile, and express it's meaning in a complete sentence.

Math   Statistics-And-Probability   
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