Interactive Statistics

3.31 A nutrition experimenter intends to compare the weight gain of male rats fed Diet A with that of male rats fed Diet B. Twenty rats are available for this experiment. She would like to randomly allocate 10 rats to Diet A and the remaining 10 rats to Diet B. She decides to label the 20 rats as follows: 01, 02, 03, ..., 20. (a) Use the experimenter's labels and your calculator (with a seed value of 72) or the ran- dom number table (starting with Row 26, Column 1) to identify the labels of the first 10 rats selected that would be assigned to Diet A. (b) The experimenter hopes Diet A is the better diet. To avoid possible bias in her results because of her favoritism, she blinds herself to her experiment. Explain how she would do this