STATS 200 - Sophia Introduction to Statistics Milstone. Questions and Answers

STATS 200 - Sophia Introduction to Statistics Milstone. Questions and Answers Cindy measured and recorded the temperature of a liquid for an experiment. She used a poorly calibrated thermometer and noted the temperature as 100.5 degrees Fahrenheit. The actual temperature of the liquid was 95 degrees Fahrenheit. The percent error in her calculation is __________.  5.79%  4.08%  -5.79%  -4.08% RATIONALE Recall that the percent error is equivalent to the absolute difference divided by the actual value. If the absolute measure is 95 degrees and the observed measure is 100.5 degrees, then the absolute error is: So we calculate the percentage error to be: CONCEPT Absolute Change and Relative Change 2 A trainer is studying the effects of vitamin D on his athletes. He has realized that there are many potential confounding factors, such as gender and age. To limit the effect of these confounding variables, he decided to first group two athletes together based on these variables (for example, two 21-year-old males). Then he randomly assigned one person to receive the vitamin D and the other to receive a sugar pill. What type of experimental design does this situation demonstrate?  Randomized Block Design  Simple Random Design  Completely Randomized Design  Matched-Pair Design RATIONALE By matching on age and gender this is called a matched-pair design.