Answered: The district sales manager for a major…

Algebra & Trigonometry with Analytic Geometry

13th Edition

ISBN:9781133382119

Author:Swokowski

Publisher:Swokowski

Chapter7: Analytic Trigonometry

Section7.6: The Inverse Trigonometric Functions

Problem 91E

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. profile-image Time remaining: 00 : 09 : 33 Statistics and Probability The district sales manager for a major supermarket chain is studying sales. He believes sales depend primarily on three factors: population density in thousands (X1), advertising budget in thousands of dollars (X2), and number of competitors in the region (X3). After careful sampling and investigation he comes up with the following regression equation where sales are in thousands of dollars: Y' = 1700 + 14.2X1 + 0.86X2 − 23X3 It is rumored that 2 of the competing chains are closing store in the area. What increase in mean sales (to the nearest thousand dollars) can the sales manager expect for a store in a community with a population of 6100, an advertising budget of $2200 if these two competitors leave the market? Multiple Choice $17 000 $23 000 $46 000 $57 000 $19 496

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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