STAT 2303 Quiz pg. 1 of 2 Fall 2017 Stat 2303-Quiz 2 Name: Quiz based on Exam 2
ID: 2925873 • Letter: S
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STAT 2303 Quiz pg. 1 of 2 Fall 2017 Stat 2303-Quiz 2 Name: Quiz based on Exam 2 Material: [Worth 10 Points] QuizScore: -/10 1. [2 Points] (Class Notes) True or False: For each of the following statements, decide whether it is TRUE or a) If the population is Skewed right and you take a random sample of 35 observations from this FALSE. If FALSE, explain why. population, then the distribution of the sample will be approximately normal. b) "We are 97% confident that the sample mean falls between 3.0 and 3.25". c) The ages of actresses when they won an acting award is summarized by the statistics: n = 77, x. 357 years, and s = 11.6 years. The hypotheses tested was Ho : "X = 35.7 vs. H:-26-357.Explanation / Answer
(a) True, as the distribution of population doesn't affect the distribution of sample means if sample size is above 30.
(b) False, We never calculate confidence interval for sample mean, it is find to see where the population mean lies. Sample mean we can calculate with observations or measurement.
(c) False, We never hypothesis that sample mean = calculatd sample mean. Hypothesis is for population mean to some standard value. So, here hypothesis testing is wrongly done and for wrong thing.
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