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A pharmaceutical company believes a new drug will lower LDL cholesterol levels. A group of 40 people with high LDL cholesterol levels {above 240 mgfd L) are to be given the new drug for a trial period, but make no lifestyle changes. Below is the data for LDL levels before and after the trial. 2. a. Show there is evidence that the drug lowers LDL levels. (Do a significance test on the differences. Remember all the requirements for a significance test, state hypothesis, T statistic, P Value, and reject or fail to reject) b. If this drug is expensive, comment on the practicality of using this drug to lower LDL cholesterol levels. LDL Levels in mgde Before Trial After Trial Difference Before Trial After Trial 249 244 251 252 262 251 243 244 244 257 Difference 5 3 3 O 2 3 4 O 1 3 Before Trial 257 260 248 243 256 247 246 254 257 247 After Trial 253 262 250 241 251 243 242 254 252 245 Difference -4 2 2 -2 -5 -4 -4 0 -5 -2 Before Trial 247 257 257 260 243 257 256 255 241 247 After Trial 248 257 253 256 241 259 254 251 238 248 Difference 1 -4 -4 -2 2 -2 -4 -3