The sampling distribution of 
is approximately normal if the sample size is more than 30.
Correct Answer:
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Q1: An unbiased estimator is said to be
Q6: An unbiased estimator is a sample statistic
Q9: The sample variance is a point estimate
Q11: An interval estimate is an estimate of
Q14: In testing a hypothesis about a population
Q14: If there are two unbiased estimators of
Q15: In determining the sample size needed to
Q17: Knowing that an estimator is unbiased only
Q18: The sample variance (where you divide by
Q27: The confidence interval estimate of the population
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