What is the relationship between diamond price and carat size? 307 diamonds were sampled and a straight-line relationship was hypothesized between y = diamond price (in dollars) and x = size of
The diamond (in carats) . The simple linear regression for the analysis is shown below: Least Squares Linear Regression of PRICE
Predictor
Interpret the coefficient of determination for the regression model.
A) There is sufficient evidence to indicate that the size of the diamond is a useful predictor of the price of a diamond when testing at alpha .
B) For every 1-carat increase in the size of a diamond, we estimate that the price of the diamond will increase by .
C) We expect most of the sampled diamond prices to fall within of their least squares predicted values.
D) We can explain of the variation in the sampled diamond prices around their mean using the size of the diamond in a linear model.
Correct Answer:
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