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22. (continued) (b ) (4 points) Calculate the overall mean consumption of fresh vegetables for men and women combined. (c) (4 points) Calculate the overall standard deviation on the consumption of fresh vegetables for men and women combined.22. (12 points) The data in the table are taken from a survey of the diet of 2848 adults in a region of China. The numbers of men and women surveyed were divided, separately, into four equal parts on the basis of their fresh vegetable consumption. These parts are shown as Q1, Q2, Q3 and Q4, which are the 1st and 3"d and 4"h quartiles respectively. The mean consumption in grams per day is given for fresh vegetables in each part, for men and women separately. For example, the mean consumption of fresh vegetables by men in Q1 is 204 grams per day. The columns headed SD give the standard deviations of the fresh vegetable consumptions by all men and all women respectively. Men (sample size 1308) Women (sample size 1540) Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Mean Mean Mean Mean SD Mean Mean Mean Mean SD Fresh vegetable 204 259 266 317 32.5 178 235 266 304 31.4 (a) (4 points) Calculate the overall mean consumption of fresh vegetables for men and women separately