Use the following information to answer question 5a-5c: the distribution of ages

Question

Use the following information to answer question 5a-5c: the distribution of ages for students at the state college is positively standard with the mean of mu = 21.5 and a standard deviation of sigma = 3 Which of the following is correct? The probability of selecting a random sample of n = 4 students with an average age greater than is 16. The probability of selecting a random sample of n = 4 students with an average age greater than is 23 cannot be computed because it is less than 30. The probability of selecting a random sample of n = 4 students with an average age greater than is 23 cannot be computed because the population is The probability of selecting a random sample of n = 4 students with an average age greater than is 23 cannot be computed because it is less than 30 AND the population is

Explanation / Answer

given u=21.5

standard deviation = 3

we know by formulea z = (x – ) / = 23-21.5/ 3

=0.16

so option a is answer

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