Linear Regression Formula Used for prediction purposes for values beyond the region of the given data Equation and are the means of x and y is the standard deviation of x is the covariance ID: 786334
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Slide1
6.8
Linear Regression Formula
Slide2Linear Regression Formula:
Used for prediction purposes for values beyond the region of the given data.
Equation:
and are the means of x and y is the standard deviation of x is the covariance
Slide3Example
M
r. Lori was trying out a new recipe for pizza. The data in the table shows how popular the new pizza was.
Write downThe correlation coefficient, rThe regression line of y on x.Use your line to predict the number of pizzas sold on day 8 and on day 14.Can you predict how many pizzas will be sold on day 30?DayNumber135791113151719# pizzas sold10151924303743455360
Slide4Example
Dave thought that there was a strong correlation between a child’s IQ score and SAT score. The IQ scores of some children were
78 89 92 96 99 100 102 111 113 128 135
CalculateThe mean IQThe standard deviation of the IQGiven that their mean SAT score was 896 with standard deviation 174 and that , find the regression line of y on x.Use your regression line to estimate the SAT score of a child with an IQ score of 84123
Slide5Assignment
P.327 #1-9 odd