Indy 500 Qualifier Speeds The speeds in miles per hour of six randomly selected qualifiers for the Indianapolis 500 (in 2012) are listed below. Estimate the mean qualifying speed with 99% confidence. Assume the variable is normally distributed. Use a graphing calculator and round the answers to at least two decimal places. 222.891 222.929 223.422 223.684 224.037 225.172 Send data to Excel 223.5329 225.6009 X 5