Question: whats the different in linear regression in R programing language between male*athlete and male:athlete model3

whats the different in linear regression in R programing language between male*athlete and male:athlete model3 <- lm(colgpa~hsize+I(hsize^2)+hsperc+sat+male*athlete,data=gpa2) model3 <- lm(colgpa~hsize+I(hsize^2)+hsperc+sat+male:athlete,data=gpa2)

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