Prior to Class Quiz 6_ Statistics for Business-T123PWB-2

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International School of Business, UEH *

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T123

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Statistics

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May 23, 2024

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pdf

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Uploaded by CaptainHornet4267

4/25/23, 10:00 PM Prior to Class Quiz 6: Statistics for Business-T123PWB-2 Prior to Class Quiz 6 Due Mar 4 at 5:45pm Points 10 Questions 10 Time Limit 20 Minutes Attempt History Attempt Time Score LATEST Attempt 1 13 minutes 10 out of 10 Score for this quiz: 10 out of 10 Submitted Mar 4 at 5:13pm This attempt took 13 minutes. Correct! Question 1 1/1 pts In constructing a 95 percent confidence interval, if you increase n to 4n, the width of your confidence interval will be (assuming other things remain the same): about two times wider. about 25 percent of its former width. about four times wider. about 50 percent of its former width. Question 2 1/1 pts A sample is taken and a confidence interval is constructed for the mean of the distribution. At the center of the interval is always which value? https://flearn.kfo.edu.vn/courses/206/quizzes/3104 1/5

4/25/23, 10:00 PM Prior to Class Quiz 6: Statistics for Business-T123PWB-2 The population mean pu Both -' and y as long as there are not too many outliers Neither -' nor u since with a sample anything can happen Correctl The sample mean X Question 3 1/1 pts The Central Limit Theorem (CLT): applies only when py and o are known. applies best to populations that are skewed. applies only to samples from normal populations. Correctl applies to any population. Question 4 1/1 pts The Central Limit Theorem (CLT) implies that: the population will be approximately normal if n 2 30. repeated samples must be taken to obtain normality. the mean follows the same distribution as the population. Correctl the distribution of the mean is approximately normal for large n. https://learn.kfo.edu.vn/courses/206/quizzes/3104 2/5

4/25/23, 10:00 PM Correct! Correct! Prior to Class Quiz 6: Statistics for Business-T123PWB-2 Question 5 171 pts The standard error of the mean decreases when: the standard deviation decreases or n increases. the population size decreases. the standard deviation increases. the sample size decreases. Question 6 1/1 pts For a given sample size, the higher the confidence level, the: more accurate the point estimate. smaller the standard error. smaller the interval width. greater the interval width. Question 7 1/1 pts If a normal population has parameters y = 40 and o = 8, then for a sample size n = 4: the standard error of the sample mean is approximately 2. https://flearn.kfo.edu.vn/courses/206/quizzes/3104 3/5

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