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Please attach the solutions to this questions. Thank you in advance 3.2 A manager records the number of hours of overtime claimed by 40 staff

Please attach the solutions to this questions. Thank you in advance

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3.2 A manager records the number of hours of overtime claimed by 40 staff in a month. The histogram in Figure 1 represents the results. Frequency density 10 15 20 25 30 Hours of overtime Figure 1 (a) Calculate the number of staff who have claimed less than 10 hours of overtime in the month. (4) (b) Estimate the median number of hours of overtime claimed by these 40 staff in the month. (2) (c) Estimate the mean number of hours of overtime claimed by these 40 staff in the month. (2)

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