Question: Thirty teenagers whose total cholesterol level is higher than what is advisable underwent treatment that consisted of a diet and physical activities. The tables show
Thirty teenagers whose total cholesterol level is higher than what is advisable underwent treatment that consisted of a diet and physical activities. The tables show the levels of LDL cholesterol (mg/dL) before and after the treatment. Check if the treatment was effective (a ¼5%). Before the treatment

After the treatment

220 212 227 234 204 209 211 245 237 250 208 224 220 218 208 205 227 207 222 213 210 234 240 227 229 224 204 210 215 228
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