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Glossary

y_minus_y_hat

The y value of the "ith" observation (xi, yi) minus the y value of the point on the regression line.

Test from Kelly

Test from Kelly.

Test from Kelly 2

Test from Kelly 2.

Sample mean

Sample mean, indicated by the symbol x bar.

Sum of values of x

Sample mean equals the sum of the values of x divided by the number of values n.

car_icon

car icon.

Formula for standard deviation

The formula for standard deviation, or the square root of the difference between the random value and the expected value squared times the probability of the random variable.

Formula (equivalent) for standard deviation

An alternative formula for standard deviation, or the square root of the difference between the mean (average) of the squared observed values and the mean of the observed values squared.

Square root of the squares

The square root of the squares of the difference between each observation and the expected value multiplied by their probabilities. The first term inside the square root is the first value, 0, minus the expected value or mean, 1.9, all squared, and multiplied by the probability of a 0, or 0.1, and so on for the next value, summed for all values and then take the root.

The square root of 0.89

The square root of 0.89.

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