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.
International Finance Vivek Sharma University of Memphis written by Precious Fox Chapter 8 RelationshipsAmong in Inflation, Interest Rates, and Exchange Rates Purchasing power parity theory – quantify relationship between inflation and the exchange rate. Supports the notion about how high inflation places downward pressure on a currency's value, but specifies the degree by which currency will weaken. It also suggests that exchane rate will not remain constant but adjust to maintain the parity in purchasing power. PPP is a derivation – percent change in formula, reflects relationship between inflation rates and exchange rates. Foreign exchange rate (1+Ih) - 1 Ih = interest rate of home country (1+If)