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The speeds in miles per hour of six randomly selected qualifiers for the Indianopolis 500 (in 2012) are listed below. Estimate the mean qualifying speed

The speeds in miles per hour of six randomly selected qualifiers for the Indianopolis 500 (in 2012) are listed below. Estimate the mean qualifying speed with 95% confidence. Round your answers to at least four decimal places.

222.929 226.240 225.172 222.891

226.484 223.684

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