Indy 500 Qualifier Speeds The speeds in miles per hour of seven randomly selected qualifiers for the Indianapolis 500 (in 2012) are listed below. Estimate the mean qualifying speed with 95% confidence. Assume the variable is normally distributed. Use a graphing calculator and round the answers to at least two decimal places. 222.891 223.684 225.172 226.484 226.240 225.172 222.929

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