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4) The following lists the heights of some classmates in centimetres. 180, 156, 148, 151, 168, 172, 190, 167 a) Calculate the mean of the

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4) The following lists the heights of some classmates in centimetres. 180, 156, 148, 151, 168, 172, 190, 167 a) Calculate the mean of the sample [1] Round to 2 decimal places if necessary b) Calculate the standard deviation of the sample [2] Round to 2 decimal places if necessary Please complete the chart with the squared deviations for full marks 180 156 148 151 168 172 190 167

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