How to solve 1d and 1f

1. The Natural Resources is interested in the relationship between the catch rate y (in fish per hour) and the temperature x of the water in the River. A sample of n = 100 fisherpersons were surveyed and the following estimated regression model was fit using the resulting data: $ = - 1.5+ 0.15x- 0.0004x2 SSResid = 238.9 SSTo = 709.3 a) Estimate the mean catch rate for a water temperature of x = 70 . b) Give a point estimate for the standard deviation of e. c) Compute and interpret the value of R . d) Test the utility of this quadratic regression model. e) Compute the value of the adjusted R' statistic. f) Ifs, = 0.00036, test whether or not the x2 term is significant in the model