Question

A study reports that teenagers drink an average of 22 ounces of soda per day with a standard deviation of 6 ounces. Assume that the distribution of the number of ounces of soda consumed by teenagers per day follows a normal distribution. a. What is the probability that a randomly selected teenager consumes less than 12 ounces of soda per day? b. What is the probability that a randomly selected teenager consumes more than 30 ounces of soda per day? c. Assume a random sample of 48 teenagers. What is the probability that the sample mean of the soda intake per day (in ounces) is between 18 and 24? d. If the distribution of the number of ounces of soda consumed by teenagers per day does not follow a normal distribution, does the calculation in c remains valid and why?

Answer 1

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