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In a certain industry, the numbers of thousands of employees in 1970 were as shown in the table below by age groups. Age last 2024

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In a certain industry, the numbers of thousands of employees in 1970 were as shown in the table below by age groups. Age last 2024 2539 50- 54 W birthda 4s thousands (a) Draw a histogram to represent these data. (5 marks) (b) Estimate the mean and the standard deviation of the ages of employees in the industry

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