Solve the problem.In statistics, the sampling distribution of the random variable Z = 
is the standard normal distribution, where 
is the sample mean, ? is the population mean, ? is the population standard deviation, and n is the sample size. Simplify this expression.
A. Z = 
B. Z = ?
(
- ?)
C. Z = 
D. Z = 
Answer: C
Mathematics
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Insert ? or ? in the blank to make the statement true.? 
{6, 9, 13, 0, 10, 14}
A. ? B. ?
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Factor:
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List the first n terms of the geometric sequence satisfying the given conditions.a2 = 6, a3 = 12, n = 4
A. 6, 12, 24, 48 B. 3, 6, 12, 48 C. 1, 6, 12, 24 D. 3, 6, 12, 24
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