Sketch histogram showing 20 sample means use classes -05 to

Reference no: EM13471427

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.

Reference no: EM13471427

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