Given the following sample data in a grouped frequency distribution Data Frequency 70 - 74 75 - 79 80 - 84 85 - 89 90 - 94 95 - 99 100 - 104 1 1 2 3 4 7 14 105 - 109 17 110 - 10 114 (a) Find the mean (give you answer to one decimal) = What would the correct notation be? Enter mu, x-bar, s, or sigma. (b) Find the standard deviation (give your answer to two decimals) = What would the correct notation be? Enter mu, x-bar, s, or sigma.

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