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Quiz 8 - Post-Lecture Question 1 The point estimate of the...

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Post-Lecture, Question 1 The point estimate of the population mean is __________. a) the sample mean b) the sample size c) the sample proportion d) the sample variance Post-Lecture, Question 2 In the estimation of the population mean when the population is known, to construct a confidence interval for a level of confidence equal to 95%, we use z values that leave out, in the lower and the upper tails of the normal distribution, an area equal to __________. a) 0.05 b) 0.95 c) 0.025 d) 0.01 Post-Lecture, Question 3 If the samples of small size, n, (say n = 10) are drawn from a normally distributed population the distribution of the sample means is distributed approximately as a __________. a) normal distribution b) non-normal distribution c) skewed distribution d) binomial distribution Post-Lecture, Question 4 A t-distribution is similar the z-distribution except that __________. a) it is not symmetrical b) it has more area in the tails c) it is not bell-shaped d) it is not unimodal Post-Lecture, Question 5
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