OPRE 6301

A race car driver tested his car for time from 0 to 60 mph, and in 20 tests obtained an average of 48.5 seconds with a standard deviation of 1.47 seconds. A 95% confidence interval for the 0 to 60 time is 45.2 seconds to 51.8 seconds. True False If all possible samples of size n are drawn from a normal population, the probability distribution of the sample mean is a normal distribution. True False A sample of size n is selected at random from an infinite population. As n increases, ...