5. Suppose that the age of a randomly selected business major can be considered to be a random variable with mean 20 years and standard deviation 2 years. A group of 64 business majors is selected at random and their average age ☎ is calculated. a) What is the approximate sampling distribution of and why? ☛ is approximately normal with mean 20 and s.d. 2 by central limit theorem T is approximately normal with mean 20 and s.d. 2 √64 T is approximately binomial with mean 20 and s.d. theorem by central limit theorem 2 /64 by central limit T is approximately binomial with mean 20 and s.d. 2 by central limit theorem

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5. Suppose that the age of a randomly selected business major can be considered to
be a random variable with mean 20 years and standard deviation 2 years. A group of
64 business majors is selected at random and their average age is calculated.
a) What is the approximate sampling distribution of and why?
T is approximately normal with mean 20 and s.d. 2 by central limit theorem
T is approximately normal with mean 20 and s.d.
2
√64
T is approximately binomial with mean 20 and s.d.
theorem
by central limit theorem
2
√64
by central limit
T is approximately binomial with mean 20 and s.d. 2 by central limit theorem
Transcribed Image Text:5. Suppose that the age of a randomly selected business major can be considered to be a random variable with mean 20 years and standard deviation 2 years. A group of 64 business majors is selected at random and their average age is calculated. a) What is the approximate sampling distribution of and why? T is approximately normal with mean 20 and s.d. 2 by central limit theorem T is approximately normal with mean 20 and s.d. 2 √64 T is approximately binomial with mean 20 and s.d. theorem by central limit theorem 2 √64 by central limit T is approximately binomial with mean 20 and s.d. 2 by central limit theorem
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