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What does the slope need to be to have NO linear regression? 0 D Question 2 1 pts An r value of 0.987 has a higher correlation than an r value of -0.987 True O False D Question 3 1 pts If the p value is greater than or equal to the r value, then there is enough evidence to say that the correlation value is significant. True O False D Question 4 1 pts What is the dif of a t distribution with a sample size of 30? 20