MATH 3339 TEST 2 QUESTIONS WITH CORRECT DETAILED ANSWERS A+ VERIFIED 100% PASS

MATH 3339 TEST 2 QUESTIONS WITH CORRECT DETAILED ANSWERS A+ VERIFIED 100% PASS For a fixed confidence level, when the sample size increases, - correct answers-the length of the confidence interval for a population mean decreases. find z score - correct answers-qnorm(1-sig/2) The best point estimate for the population mean - correct answers-is the sample mean The margin of error - correct answers-can be computed from ±z* ⋅ σ/sqrt(n) A statement contradicting the claim in the null hypothesis is classified as the power. - correct answersfalse If we want to claim that a population parameter is different from a specified value, this situation can be considered as a one-tailed test. - correct answers-false A 90% confidence interval for a population parameter means that if a large number of confidence intervals were constructed from repeated samples, then on average, 90% of these intervals would contain the true parameter. - correct answers-true The point estimate of a population parameter is always at the center of the confidence interval for the parameter. - correct answers-true The choice between a z-test and a t-test for a population mean depends primarily on: a) the sample size. b) the level of significance. c) whether a one- or two-tailed test is indicated