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(a) [6 marks] Create a histogram of weekly income in Excel. Use 8 bins and format the axis to 1 decimal place. Comment on the main features of the distribution, including the skewness of the distribution. (b) [5 marks] Using Excel, calculate and give both a point estimate and an interval estimate of the mean weekly income of the population of New Zealanders aged 15-45. Use a 99% level of confidence and state your value of s, the sample standard deviation for your dataset. (c) [5 marks] Write do ...


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