Answered: Location is known to affect the number,…

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

Location is known to affect the number, of a particular item, sold by Walmart. Two different locations, A and B, are selected on an experimental basis. Location A was observed for 9 days and location B was observed for 13 days. The number of the particular items sold per day was recorded for each location. On average, location A sold 39 of these items with a sample standard deviation of 9 and location B sold 51 of these items with a sample standard deviation of 6. Does the data provide sufficient evidence to conclude that the true mean number of sales at location A is fewer than the true mean number of sales at location B at the 0.05 level of significance? Select the [Alternative Hypothesis, Value of the Test Statistic].

a) [μ₁ − μ₂ ≠ 0, -0.3765]

b) [μ₁ − μ₂ = 0, -3.765]

c) [μ₁ − μ₂ < 0, t = −3.498]

d) [μ₁ − μ₂ > 0, t = −3.498]

e) [μ₁ − μ₂ ≠ 0, t = −3.498]

f) None of the above

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