A 3809 E HT Find the mean and standard deviation of these heights. Round your answers to three decimal places, if necessary. Mean: Standard deviation: Fill in the table below to give grouped relative frequencies for these heights. Frequency Relative Frequency Frequency Group 60 63.9 64 67.9 68 71.9 72-75.9 76 79.9 20 15 10 5 1 60 64 68 72 numbers The graph above shows a frequency 76 80

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