QUESTION 33"Lula-Rae Inc. claims that ingesting a concoction of lemon and lavender essential oils will significantly elevate mood in consumers. To test this, a skeptical premedical student selects a sample of 144 participants. Each participant drinks a mixture of the essential oils and then completes a mood inventory. The population score on this mood inventory has a mean = 43 with a standard deviation = 7. The sample of n = 144 participants had a mean score of M = 42. Calculate the z-observed value that would result from this hypothesis test (Be sure to round your answer to the second decimal place). "

Given information Sample mean M = 42 Population mean µ = 43 Sample size n = 144 Standard deviation σ…

Answered: "Lula-Rae Inc. claims that ingesting a…

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 33

"Lula-Rae Inc. claims that ingesting a concoction of lemon and lavender essential oils will significantly elevate mood in consumers. To test this, a skeptical premedical student selects a sample of 144 participants. Each participant drinks a mixture of the essential oils and then completes a mood inventory. The population score on this mood inventory has a mean = 43 with a standard deviation = 7. The sample of n = 144 participants had a mean score of M = 42. Calculate the z-observed value that would result from this hypothesis test (Be sure to round your answer to the second decimal place). "

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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