A company has recently recruited new employees. The age of each of the recruits has been recorded below. 23 30 25 45 24 29 32 40 31 35 36 38 42 46 49 51 54 60 32 43 a) Starting at 20, group the data...

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Extracted text: A company has recently recruited new employees. The age of each of the recruits has been recorded below. 23 30 25 45 24 29 32 40 31 35 36 38 42 46 49 51 54 60 32 43 a) Starting at 20, group the data using a frequency distribution with intervals of 5, i.e. 20 - 24, 25 - 30 and so on. b) Find the mean age of the grouped data. c) Calculate the variance and standard deviation of the grouped data.