2. Identify the type of sampling used (simple random, cluster, stratified, systematic, convenience) a. You pick every student in 34 classes at PCC to find the mean height of PCC students. b. You are trying to find the average income of U.S adults and you select 1,000 adults from each state. c. In a Gallup poll of 1059 adults, the interview subjects were selected by using a computer to randomly generate telephone numbers that were then called. d. Police officer checked every tenth car in the college parking lot to find the average car manufacture. e. A student is trying to test which phones are better Apple or Samsung by asking their family. 2. Identify the type of sampling used (simple random, cluster, stratified, systematic, convenience)a. You pick every student in 34 classes at PCC to find the mean height of PCC students.b. You are trying to find the average income of U.S adults and you select 1,000 adults from eachstate.c. In a Gallup poll of 1059 adults, the interview subjects were selected by using a computer torandomly generate telephone numbers that were then called.d. Police officer checked every tenth car in the college parking lot to find the average carmanufacture.e. A student is trying to test which phones are better Apple or Samsung by asking their family.

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Description: 2. Identify the type of sampling used (simple random, cluster, stratified, systematic, convenience) a. You pick every student in 34 classes at PCC to find the mean height of PCC students. b. You are trying to find the average income of U.S adults and

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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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2. Identify the type of sampling used (simple random, cluster, stratified, systematic, convenience)

a. You pick every student in 34 classes at PCC to find the mean height of PCC students.

b. You are trying to find the average income of U.S adults and you select 1,000 adults from each state.

c. In a Gallup poll of 1059 adults, the interview subjects were selected by using a computer to randomly generate telephone numbers that were then called.

d. Police officer checked every tenth car in the college parking lot to find the average car manufacture.

e. A student is trying to test which phones are better Apple or Samsung by asking their family.

Definition Definition Measure of central tendency that is the average of a given data set. The mean value is evaluated as the quotient of the sum of all observations by the sample size. The mean, in contrast to a median, is affected by extreme values. Very large or very small values can distract the mean from the center of the data. Arithmetic mean: The most common type of mean is the arithmetic mean. It is evaluated using the formula: μ = 1 N ∑ i = 1 N x i Other types of means are the geometric mean, logarithmic mean, and harmonic mean. Geometric mean: The nth root of the product of n observations from a data set is defined as the geometric mean of the set: G = x 1 x 2 ... x n n Logarithmic mean: The difference of the natural logarithms of the two numbers, divided by the difference between the numbers is the logarithmic mean of the two numbers. The logarithmic mean is used particularly in heat transfer and mass transfer. ln x 2 − ln x 1 x 2 − x 1 Harmonic mean: The inverse of the arithmetic mean of the inverses of all the numbers in a data set is the harmonic mean of the data. 1 1 x 1 + 1 x 2 + ...

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