Explore the relationship between the number of siblings a respondent has (SIBS)

Question

Explore the relationship between the number of siblings a respondent has (SIBS) and his or her number of children (CHILDS).

1. Construct a scatterplot of these two variables in SPSS, and place the best-fit linear regression line on the scatterplot. Describe the relationship between the number of siblings a respondent has (IV) and the number of his or her children (DV).

2. Calculate the regression equation predicting CHILDS with SIBS. What are the intercept and the slope? What are the coefficient of determination and the correlation coefficient?

3. What is the predicted number of children for someone with three siblings?

4. What is the predicted number of children for someone without any siblings?

Explanation / Answer

y = dependent variable (a regression model has exactly one dep. variable)x= independent variable (a regression model has 1 or more ind. variables)a = constant = “y-intercept”b = (unstandardized) coefficient = slope What is the y intercept[1]? the slope? [2]What are the coefficient of determination [3]and the correlation coefficient? [4]What is the predicted number of children for someone with three siblings? (Hint use Regression Equation y = a + bx). [5]What is the predicted number of children for someone without any siblings?[6]Specified Answer for: 11.396 Specified Answer .138

for: 2Specified Answer for: 3.050Specified Answer for: 4.223Specified Answer for: 52 Specified Answer for: 61 2

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