Recently, a neurotransmitter called Galanin has been discovered that appears to effect one's desire to eat foods with a high fat content. Specifically, the more of this naturally occurring neurotransmitter an individual possesses, the higher his/her craving for high fat foods. Recently, a drug company developed an experimental drug that blocks Galanin without affecting appetite for lower fat foods. The company immediately sets out to test the drug. An experiment is conducted in which 12 female volunteers are randomly selected and given a daily dose of the experimental drug for six months. Their weights are measured before and after the drug treatment. The data from study are in the table below.Can the pharmaceutical company conclude that the mean weight after the drug is significantly different than mean weight before the administration of the drug? Test with an α = 0.01.Calculate and interpret the effect size. Weight before drugtreatment (Ibs)165Weight after drugtreatment (Ibs)145143175137170135136148141138137125161155158140172164156178165182170

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Description: Recently, a neurotransmitter called Galanin has been discovered that appears to effect one's desire to eat foods with a high fat content. Specifically, the more of this naturally occurring neurotransmitter an individual possesses, the higher his/her

Weight before drug treatment (lbs) x Weight before drug treatment (lbs) y d=x-y d-d¯2 165 145 20…

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

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Recently, a neurotransmitter called Galanin has been discovered that appears to effect one's desire to eat foods with a high fat content. Specifically, the more of this naturally occurring neurotransmitter an individual possesses, the higher his/her craving for high fat foods. Recently, a drug company developed an experimental drug that blocks Galanin without affecting appetite for lower fat foods. The company immediately sets out to test the drug. An experiment is conducted in which 12 female volunteers are randomly selected and given a daily dose of the experimental drug for six months. Their weights are measured before and after the drug treatment. The data from study are in the table below.
1. 1. Can the pharmaceutical company conclude that the mean weight after the drug is significantly different than mean weight before the administration of the drug? Test with an α = 0.01.
  2. Calculate and interpret the effect size.

Weight before drug
treatment (Ibs)
165
Weight after drug
treatment (Ibs)
145
143
175
137
170
135
136
148
141
138
137
125
161
155
158
140
172
164
156
178
165
182
170

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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