QUESTION 7 I have conducted a linear regression model to predict student scores on an exam based on the number of hours they studied. I get a coefficient (slope) of +2.5 for the variable of hours studied. The pvalue for this coefficient is 0.45 and the 95% confidence interval is [-2.5, +7]. Which of the following conclusions CANNOT be drawn from these results? At an alpha of 0.05, we can say that the effect of hours studied on exam score is significant O Our model predicts that, on average, one hour of studying increases exam score by 2.5 points O One hour of studying could lead to a 7 point increase in exam score O One hour of studying could lead to a 2.5 point decrease in exam score