Answered: The age when smokers first start from…

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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Question 5: The age when smokers first start from previous studies is normally distributed with a mean of 13 years old with a population standard deviation of 1.5 years old. A survey of smokers of this generation was done to estimate if the mean age has changed. The sample of 34 smokers found that their mean starting age was 13.2 years old. Find the 99% confidence interval of the mean.

______ < _______ < _______

The age when smokers first start from previous studies is normally distributed with a mean of 13 years old
with a population standard deviation of 1.5 years old. A survey of smokers of this generation was done to
estimate if the mean age has changed. The sample of 34 smokers found that their mean starting age was
13.2 years old. Find the 99% confidence interval of the mean.
Select an answer v
Do not round in between steps. Round answers to at least 3 decimal places.

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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