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1 Which statement about correlation is FALSE? The correlation of a data set can be positive, negative, or 0. Correlation is used to define the variables of only non-linearly related data sets. Correlation between the variables of the data set can be measured. Correlation is the degree to which the two variables of a data set resemble each other. 2 Which of the following is a guideline for establishing causality? Keep all variables the same to get duplicate results. Do not consider other possible causes. Check if the effect is present or absent when the response variable is present or absent. Look for cases where correlation exists between the variables of a scatterplot. 3 Data for weight (in pounds) and age (in months) of babies is entered into a statistics software package and results in a regression equation of ŷ = 17 + 0.8x. What is the correct interpretation of the slope if the weight is the response variable and the age is the explanatory variable? The weight of a baby decreases by 0.8 pounds, on average, when the baby's age increases by 1 month. The weight of a baby increases by 0.8 pounds, on average, when the baby's age increases by 1 month. The weight of a baby decreases by 17 pounds, on average, when the baby's age increases by 1 month. The weight of a baby increases by 17 pounds, on average, when the baby's age increases by 1 month.