Chapter 1 - Introduction to Statistics - Section 1.3 Data Collection and Experimental Design - Exercises - Page 24: 15

(a) The units are the 250 females ages 30 to 35 in the study. The new allergy drug. (b) Bias on the part of the researcher if the researcher knows which patients were given the real drug. Make the study a double-blind experiment. (c) The researcher did not know which patients received the real drug or the placebo.

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