Answered: The article “Automatic Filtering of…

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 article “Automatic Filtering of Outliers in RR Intervals Before Analysis of Heart Rate
Variability in Holter Recordings: a Comparison with Carefully Edited Data” (M. Karlsson,
et al., Biomedical Engineering Online, 2012) reports measurements of the total power, on
the log scale, of the heart rate variability, in the frequency range 0.003 to 0.4 Hz, for a
group of 40 patients aged 25–49 years and for a group of 43 patients aged 50–75 years. The
mean for the patients aged 25–49 years was 3.64 with a standard deviation of 0.23, and the
mean for the patients aged 50–75 years was 3.40 with a standard deviation of 0.28. Find a
95% confidence interval for the difference in mean power between the two age groups.

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