Computer output for fitting a simple linear model is given below. State the value of the sample slope for this model and give the null and alternative hypotheses for testing if the slope in the population is different from zero. Identify the p-value and use it (and a 5% significance level) to make a clear conclusion about the effectiveness of the model.

predictor coef SE Coef T P

Constant. 84.69 12.15 6.97 0.000

X. -0.01432 0.01193 -1.20 0.245

Find sample slope

Find P-value