Question

country | stork pairs(10^{2}) |
birth rate (10^{4}/year) |

Albania | 1 | 8 |

Austria | 3 | 9 |

Greece | 25 | 11 |

Portugal | 15 | 12 |

Romania | 50 | 35 |

Spain | 80 | 45 |

e) Calculate all the predicted values for the predicted variable (birth rate) for given values of the predictor variable (the number of stork pairs) in the data set.

f) On the scatterplot you constructed in (a), draw the regression line using the actual X and predicted Y scores (Y’).

Answer #1

X | y | (x-xbar)^2 | (x-xbar)(y-ybar) |

1 3 25 15 50 80 |
8 9 11 12 35 45 |
784 SS: 4714 |
336 SP: 2360 |

A) predicted equation

Sum of *X* = 174

Sum of *Y* = 120

Mean *X* = 29

Mean *Y* = 20

Sum of squares (*SS _{X}*) = 4714

Sum of products (

Regression Equation = ŷ =

ŷ = 0.50064

B) scatter plot

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