A random sample of 12 tests for two different drugs revealed the following times (in minutes) until the effects of the drug were neutralized. Drug A 254 212 244 222 236 220 250 243 250 238 246 217 Drug B 217 290 296 274 253 278 287 260 288 268 287 265 a.font size decreased by 1 Calculate the mean and standard deviation for each of the two drugs. b.font size decreased by 1 Based on the sample means calculated in part a, which drug appears to be effective longer? c.font size decreased by 1 Based on the sample standard deviations calculated in part a, which drug appears to have the greater variability in effect time? d.font size decreased by 1 Calculate the sample coefficient of variation for the two drugs. Based on the coefficient of variation, which drug has the greater variability in its time until the effect is neutralized? Question content area bottom Part 1 a. What is the mean of drug A? enter your response here (Round to two decimal places as needed.)