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the world. A sample of 30 of countries was selected, and a stem-and-leaf plot of the per capita alcohol consumption (in gallons per year) was constructed. The resulting plot, and some summary statistics are given below.

the world. A sample of 30 of countries was selected, and a stem-and-leaf plot of the per capita alcohol consumption (in gallons per year) was constructed. The resulting plot, and some summary statistics are given below.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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1. The Food and Agricultural Organization of the United Nations, FAOSTAT, collects information on the production and consumption of food and agricultural products for 200 countries around the world. A sample of 30 of countries was selected, and a stem-and-leaf plot of the per capita alcohol consumption (in gallons per year) was constructed. The resulting plot, and some summary statistics are given below. Leaf Unit = 1.0 03 Σ1지 3 802 1456888 20124555566789 ΣL1X324,560 %3D 3 001447 4 014 56 (a) What is the population under consideration here? What is the unit? (b) What is the variable of interest here? Is this variable continuous or discrete? (c) Describe the shape of the distribution. (d) Find the sample mean and sample standard deviation of the per capita alcohol consumption for this sample of 30 countries. (c) According to Chebyshev's/Tchebysheff's Theorem, what interval would contain at least 75% of the observations in the data set? What percentage of observations actually do fall within this interval? (f) Using the 1.5 IQR rule, are there any outliers in this data set? To help get you started, the first quartile is 19.5 gallons per year.
Transcribed Image Text:1. The Food and Agricultural Organization of the United Nations, FAOSTAT, collects information on the production and consumption of food and agricultural products for 200 countries around the world. A sample of 30 of countries was selected, and a stem-and-leaf plot of the per capita alcohol consumption (in gallons per year) was constructed. The resulting plot, and some summary statistics are given below. Leaf Unit = 1.0 03 Σ1지 3 802 1456888 20124555566789 ΣL1X324,560 %3D 3 001447 4 014 56 (a) What is the population under consideration here? What is the unit? (b) What is the variable of interest here? Is this variable continuous or discrete? (c) Describe the shape of the distribution. (d) Find the sample mean and sample standard deviation of the per capita alcohol consumption for this sample of 30 countries. (c) According to Chebyshev's/Tchebysheff's Theorem, what interval would contain at least 75% of the observations in the data set? What percentage of observations actually do fall within this interval? (f) Using the 1.5 IQR rule, are there any outliers in this data set? To help get you started, the first quartile is 19.5 gallons per year.
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