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Description: The effects of an iron supplement in increasing hemoglobin levels is being clinically tested on a group of 160 patients suffering from anemia (low iron). Combined with a specific dietary plan, those using the supplement experienced an average hemoglo

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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The effects of an iron supplement in increasing hemoglobin levels is being clinically tested on a group of 160 patients suffering from anemia (low iron). Combined with a specific dietary plan, those using the supplement experienced an average hemoglobin increase of 6.8 g/dL. It is known from previous clinical trials that the standard deviation of the increase in hemoglobin levels as a result of using the supplement is 2.9 g/dL. Calculate the margin of error and construct the 99% confidence interval for the true mean hemoglobin-level increase caused by the supplement.

1. E=

Round to 3 significant digits

2. ______ < μ <_____ g/dL

Round to 2 decimal places

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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