6414 - Midterm Exam Practice For Anatomy And Physiology Ii|60 Q&a Latest 2024

2. Predicting/Explanatory (independent) Variables(Xs ~ X1, X2) {Ans: These are variables we think might be useful in predicting or modeling the response variable This is a fixed variable. It does not change with the response}Hypothesis Testing {Ans: Null Hypotheses: test whether Beta_1 is equal to 0 Alternative Hypotheses: Beta_1 is not equal to zero If we want to test whether Beta_1 is equal to 0 or not, we use the t-test (to test for statistical significance). If the t-value is large, reject the null hypothesis that Beta_1 is equal to zero and if the null hypothesis is rejected, we interpret this as Beta_1 is statistically significant If we want to test whether Beta_1 is equal to a constant vs Beta_1 not equal to that constant, we use the p-value. If P-value is small (P<0.01), reject null hypothesis If we want to test whether Beta_1 is positive or negative, we use parts of the p-value: Beta_1 > 0 --> right tail Beta_1 <0 --> left tail}Sum of Square Treatments {Ans: This is the sum of ni * the square difference between the sample means of the individual samples - the overall mean}Simple Linear Regression {Ans: We have