Answered: Guidelines for the Jolly Blue Giant…

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

Guidelines for the Jolly Blue Giant Health Insurance Company claim that the average hospitalization for a triple hernia operation should not exceed 30 hours. A diligent auditor studied records of 16 randomly chosen triple hernia operations at Hackmore Hospital and found a mean hospital stay of 20 hours with a standard deviation of 20 hours. Conduct a hypothesis test to see if the auditor can prove that the average does not exceed 30. (α=.025) Assume that the hospitalization time is normally distributed.

(4) At tha a= level of squificance, your
Critical value is (a) 1.645
(b) 2.131
(c) 1.90
(d) 1.753
(5) What conclusion can be drawn from this test
at 0.025 Significance level?
(9) There is
test
enough info to do this hypother's
(b) There is Not enough evidence to reject
HO
(0) There is enough evidence to reject
Ho

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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