Which of the following in not a required condition for the error variable & in the simple linear regression model? a. The probability distribution of & is normal. b. The mean of the probability distribution of & is zero. C. The standard deviation o of & is a constant no matter what the value of d. The values of & are auto correlated.

Q: 49. If a set of X and Y scores has a Pearson correlation ofr= 0.50, 50% of the variability in Y…

A: We have given the statement about the Pearson correlation.

Q: The following table shows the number of hours spent for studying and the grade obtained by a student…

A: The provided information is  No of hours (x) Grades (y) xy x2 1.5 85 127.5 2.25 2.0 85 170 4…

Q: Which of the following refers to the variable that is being manipulated during an experiment?…

A: The objective of the question is to identify the type of variable that is manipulated or controlled…

Q: Consider the following correlations -0.9 , -0.5 , -0.2 , 0 , 0.2 , 0.5 and 0.9. For each give the…

A: Given, the correlations -0.9 , -0.5 , -0.2 , 0 , 0.2 , 0.5  and 0.9. We need to calculate the…

Q: In a regression calculation, a researcher finds that the explanatory variable x has a mean 100 and…

A: