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use grade 12 method 1. The number of bikes sold last year by various Honda dealers in a country is summarized below a) Calculate the

use grade 12 method

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1. The number of bikes sold last year by various Honda dealers in a country is summarized below a) Calculate the mean and standard deviation for this sample data. Show your work. [3 marks] # of bikes Frequency 10-20 9 20-30 15 30-40 14 40-50 5 50-60 2 b) Calculate the z-score for 21 bikes sold. [1 marks]

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