Mark is conducting an experiment on how a new medicine can treat patients suffering from the flu. He has 3 groups of patients wh
o are infected with the same flu strain, with 7 patients in each group. He gives the medicine to all of the patients in one group. The treated patients experienced an improvement in their symptoms, and the patients in the untreated groups have not. Is there a sampling bias in the situation above? A. No, all 3 groups have the same number of patients who all suffer from the same flu strain. B. Yes, the medicine may not work on the patients in the other two groups. C. Yes, the patients in the other 2 groups have different strains of the flue than the treated patients. D. There is not enough information to determine if the sample is biased.
Option D. The demographic of the patients such as age and medical history and previous or concurrent medication will have an effect on the effectiveness of the medicine.
Once you find your common denominator (24) you have to do the same to the numerator. So for the roses it would be 9/24 + 8/24 which is 17/24 for both roses and geraniums
If you add up all of the money James has earned, (1 + 7 + 14), it equals 22. If you subtract 22 from 100, it equals 78. Therefore James needs to earn 78 more dollars.
