(Answered) On average 35 percent of beachcombers bring an umbrella to

Statistics

On average, 35 percent of beachcombers bring an umbrella to the beach. Suppose this percentage follows a normal distribution with a standard deviation of 8 percent.

a. Find the probability that the percent of beachcombers with umbrellas is at least 50 percent.

b. Find the 90th percentile, and express it in a sentence.

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