STP 231 Lecture Notes - Lecture 23: Vo2 Max, Standard Deviation, Confidence Interval
Document Summary
When is known, use the equation: x-bar z /2 ( /sqrt(n)) When is unknown, use the equation: x-bar t /2 (s/sqrt(n))h. /(sqrt(n) = standard deviation of sample mean. S/sqrt(n) = standard error of sample mean (se) When using standard error, remember about the degree of freedom, which is n-1. So if it is a sample size of 15, look for the t-score of. Population distribution is normal or large enough sample. The vo2 max is a measure of aerobic physical fitness and indicates the amount of oxygen a person can use. When adjusted for body weight, the units of vo2 max are milliliters per kilogram per minute (ml/kg/min). A random sample of 12 men aged 16-24 who exercise regularly was obtained. The summary statistics were = 58. 6 ml/kg/min and s= 4. 8 ml/kg/min. Assume the underlying population is normal and construct and interpret a 90% confidence interval for the true mean vo2 max for men in this age group.
