A regression is run using 100 observations to determine the relationship between price and the number of pages in a book. Using a regression calculator, the total sum of squares was 34, the amount explained by the regression was 32, so the R2 = 32 ÷ 34 =. (it may be useful to do one of these calculations without a computer program doing all the calculation, but once one has done one or two, it is best to let the machine do the calculation.)įind the R2 for the least squares regression line that you found. Sum the X and Y columns, square X and sum, crossmultiply X and Y and sum. ![]() For the data below, compute regression coefficients a and b. Here is a simple regression coefficient calculator from the Internet. However, no one who is doing useful work does hand calculation -they use statistical programs. ![]() (It is useful to calculate a regression coefficient at least once.
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