Listed are the net sales for a San Francisco–area mail-order retailer for the years 2009 to 2018.Use the mean sales for the earliest three years to determine a base and then find the index for 2017 and 2018. (Round your answers to 1 decimal place.)By how much have net sales increased from the base period? (Round your answers to 1 decimal place.) Year20172018Simple indexBy how much have net sales increased from the base period? (Round your answers to 1 decimal place.)The net sales havebyandpercent from the 2009-2011 period to 2017 and 2018 respectively. Listed are the net sales for a San Francisco-area mail-order retailer for the years 2009 to 2018.SalesYear (millions)2009$486.62010506.82011522.22012574.62013580.7568.5581.9496.1456.6433.320142015201620172018Click here for the Excel Data FileUse the mean sales for the earliest three years to determine a base and then find the index for 2017 and 2018. (Round your answersto 1 decimal place.)The base valueYear20172018Simple index

Answered: Listed are the net sales for a San…

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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Listed are the net sales for a San Francisco–area mail-order retailer for the years 2009 to 2018.

Use the mean sales for the earliest three years to determine a base and then find the index for 2017 and 2018. (Round your answers to 1 decimal place.)

By how much have net sales increased from the base period? (Round your answers to 1 decimal place.)

Listed are the net sales for a San Francisco-area mail-order retailer for the years 2009 to 2018.
Sales
Year (millions)
2009
$486.6
2010
506.8
2011
522.2
2012
574.6
2013
580.7
568.5
581.9
496.1
456.6
433.3
2014
2015
2016
2017
2018
Click here for the Excel Data File
Use the mean sales for the earliest three years to determine a base and then find the index for 2017 and 2018. (Round your answers
to 1 decimal place.)
The base value
Year
2017
2018
Simple index

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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