Marital Smoking Educational Level Serum Systolic Pressure 126 ID # Sex Age Exercise Weight IQ Status Status Cholesterol 1 F M 27 1 1 120 193 118 2 M S 18 1 1 145 210 120 105 3 F M 32 118 196 128 115 4...

In calculating the mean and standard deviation per column, what formula should be used? is it population mean or sample mean? and is it standard deviation for population or standard deviation for sample?

Extracted text: Marital Smoking Educational Level Serum Systolic Pressure 126 ID # Sex Age Exercise Weight IQ Status Status Cholesterol 1 F M 27 1 1 120 193 118 2 M S 18 1 1 145 210 120 105 3 F M 32 118 196 128 115 4 M M 24 2 1 162 208 129 108 5 F S 19 1 2 106 188 119 106 F 56 1 143 206 136 111 7 M W 65 1 2 160 240 131 99 8 M D 36 2 1 215 215 163 106 9 F M 43 1 1 127 201 132 111 10 F D 47 1 1 1 132 215 138 109 11 M D 48 3 1 2 196 199 148 115 12 F S 25 3 109 210 115 114 13 F D 63 1 170 242 149 101 14 M M 37 2 1 187 193 142 109 15 M M 40 1 1 234 208 156 98 16 M S 25 1 2 1 199 253 135 103 17 F M 72 143 288 156 103 18 F D 56 1 1 156 164 153 99 19 M 37 2 142 214 122 110 20 F M 41 1 1 1 123 220 142 108