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Name: Grace floral shop claims that their average daily earnings is $497. An
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Description: Grace floral shop claims that their average daily earnings is $497. An auditor wants to determine whether this claim is true . the auditor selected a sample of 100 days and found that that the sample mean earnings was $495 with a sample standard devi

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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Grace floral shop claims that their average daily earnings is $497. An auditor wants to determine whether this claim is true . the auditor selected a sample of 100 days and found that that the sample mean earnings was $495 with a sample standard deviation of 9.75.assist the auditor in conducting a hypothesis test, at the 3% level of significant, to determine whether the claim about their average daily earnings was overstated.

State the null and the alternative hypothesis for the test

Using the PC value approach,state the decision rule for this test

Calculate the value of the test statistic for this tedt

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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