The mean age of all686used cars for sale in a newspaper one Saturday last month was7.7years, with a standard deviation of7.4years. The distribution of ages is right-skewed. For a study to determine the reliability of classified ads, a reporter randomly selects40of these used cars and plans to visit each owner to inspect the cars. He finds that the mean age of the40cars he samples is8.2years and the standard deviation of those40cars are5.9years. Complete parts a through c.a. From the problem statement, which of the values7.77.48.2and5.9are parameters and which are statistics? The value7.7is a▼ parameter.statistic. The value7.4is a▼ statistic.parameter. The value8.2is a▼ parameter.statistic. The value5.9is a▼ statistic.parameter. Findmu μ,sigmaσ,s, andx c. Are the conditions for using the CLT (Central Limit Theorem) fulfilled?

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Description: The mean age of all686used cars for sale in a newspaper one Saturday last month was7.7years, with a standard deviation of7.4years. The distribution of ages is right-skewed. For a study to determine the reliability of classified ads, a reporter ran

Statistic:If the value is a numerical measurement describing a characteristic of a sample then it is…

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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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The mean age of all

686

used cars for sale in a newspaper one Saturday last month was

7.7

years, with a standard deviation of

7.4

years. The distribution of ages is right-skewed. For a study to determine the reliability of classified ads, a reporter randomly selects

of these used cars and plans to visit each owner to inspect the cars. He finds that the mean age of the

cars he samples is

8.2

years and the standard deviation of those

cars are

5.9

years. Complete parts a through c.

a. From the problem statement, which of the values

7.7

7.4

8.2

and

5.9

are parameters and which are statistics?

The value

7.7

is a

▼

parameter.

statistic.

The value

7.4

is a

▼

statistic.

parameter.

The value

8.2

is a

▼

parameter.

statistic.

The value

5.9

is a

▼

statistic.

parameter.

Find

mu μ,

sigmaσ,

s, and

c. Are the conditions for using the CLT (Central Limit Theorem) fulfilled?

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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