b) The following table gives the ages of 20 students in a certain hospital. class Frequency(f)...

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b) The following table gives the ages of 20 students in a certain hospital. class Frequency(f) Mid x £.x O up to 4 4 up to 8 8 up to 12 12 up to 16 16 up to 20 | Total 2. 2 4 4 8 6 18 36 108 6 10 60 100 600 14 70 196 980 4 18 72 324 1296 20 224 660 2992 1. Compute the mean for these grouped data. 2. Compute the slandered deviation for these grouped data. 3. How many measures are greater than or equal to 12? b) The following table gives the ages of 20 students in a certain hospital. class Frequency(f) Mid x £.x O up to 4 4 up to 8 8 up to 12 12 up to 16 16 up to 20 | Total 2. 2 4 4 8 6 18 36 108 6 10 60 100 600 14 70 196 980 4 18 72 324 1296 20 224 660 2992 1. Compute the mean for these grouped data. 2. Compute the slandered deviation for these grouped data. 3. How many measures are greater than or equal to 12?