An article 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 3.88 with a standard deviation of 0.23, and the mean for the patients aged 50-75 years was 3.50 with a standard deviation of 0.28. Let μx represent the population mean for the patients aged 25-49 years and let μy represent the population mean for the patients aged 50-75 years. Find a 95% confidence interval for the difference μx - My. (Round the final answers to four decimal places.) The 95% confidence interval is (0.2676 0.4924 ).
An article 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 3.88 with a standard deviation of 0.23, and the mean for the patients aged 50-75 years was 3.50 with a standard deviation of 0.28. Let μx represent the population mean for the patients aged 25-49 years and let μy represent the population mean for the patients aged 50-75 years. Find a 95% confidence interval for the difference μx - My. (Round the final answers to four decimal places.) The 95% confidence interval is (0.2676 0.4924 ).
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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