State which of the following assertions are true and which are false:

(i) P-value for the hypothesis test can be negative. (ii) Linear correlation coefficient r=0.79 indicates a stronger linear trend than r= - 0.79. (iii) In linear regression analysis it is appropriate to fit the Least Squares regression line to the data even if the plot of our data clearly does not show a linear trend. (iv) Degrees of freedom for chi-square tests depend on the size of the sample(s).