I got the answer for q5 but am not able to get answers for q6 and 7

Question 5 Not yet answered Marked out of 1.00 f' Flag question Question 6 Not yet answered Marked out of 1.00 V Flag question Question 7 Not yet answered Marked out of 1.00 V Flag question The correlation between course grade and the amount of time spent viewing online lectures is not found to be statistically significant (based on a random sample of 225 students). Therefore. in a simple linear regression model with time spent viewing online lectures as the explanatory variable and course grade as the response variable, the coefficient of determination R2 will be close to zero. Select one: ' True ' False Using data from a random sample of 122 children, a simple linear regression model is fit to predict the amount of screen time (that is time on an electronic device or spent watching TV) per day given the number of hours of sleep per night. The coefficient of determination of the simple linear regression model is 32.3%. The model is then expanded to included independent variables for the child's hair colour and eye colour. After inclusion of the additional independent variables for hair colour and eye colour, the coefficient of determination will decrease because we do not expect hair and eye colour to have any significant effect on the amount of screen time per day. Select one: ' True ' False A 90% confidence interval for the total amount of taxable income not reported by Australian individuals is ($141,849. $155,622) (in millions of dollars). That is, we are at most 10% confident that the true total of unreported individual taxable income is outside this interval. Select one: ' True ' False