The data in the table represent the ages of the winners of an award for the past five years. Use the data to answer question.(Assume that sampling is without replacement.)For samples of size 3, construct a table of all possible samples and their sample means.AgexAgex 39,42,454239,40,474239,42,4040.3342,45,4042.3339,42,4742.6742,45,4744.6739,45,4041.3342,40,474339,45,4743.6745,40,4744 For a random sample of size 3, what is the chance that the sample mean will equal the population mean? The probability is ________________.(Type an integer or a decimal. Use the answers from part (a) and part (b) to find this answer.)

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Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.3: Measures Of Spread

Problem 2GP

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The data in the table represent the ages of the winners of an award for the past five years. Use the data to answer question.

(Assume that sampling is without replacement.)

For samples of size 3, construct a table of all possible samples and their sample means.

Age	x	Age	x
39,42,45	42	39,40,47	42
39,42,40	40.33	42,45,40	42.33
39,42,47	42.67	42,45,47	44.67
39,45,40	41.33	42,40,47	43
39,45,47	43.67	45,40,47	44

For a random sample of size 3, what is the chance that the sample mean will equal the population mean?

The probability is ________________.

(Type an integer or a decimal. Use the answers from part (a) and part (b) to find this answer.)

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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