Business Statistics Assignment Week 5 Question 1 1. Using the telephone numbers listed in your local directory as your population, randomly obtain 20 samples of size 3.
Business Statistics Assignment Week 5 Question 1 1. Using the telephone numbers listed in your local directory as your population, randomly obtain 20 samples of size 3. From each telephone number identified as a source, take the fourth, fifth, and sixth digits. a. Calculate the mean of the 20 samples b. Draw a histogram showing the 20 sample means. (Use classes -0.5 to 0.5, 0.5 to 1.5, 1.5 to 2.5 and so on). c. Describe the distribution of the x-bars that you see in part b (shape of distribution, center, and the amount of dispersion). d. Draw 20 more samples and add the 20 new x-bars to the histogram in part b. Describe the distribution that seems to be developing. Use the empirical rule to test for normality. See the sampling distribution of sample means and the central limit theorem develop from your own data!
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