The following measurements correspond to air velocity and the evaporation coefficient of burned fuel droplets in a boost engine. The 95% confidence interval for the regression coefficient alpha is : [...

The following measurements correspond to air velocity and the evaporation coefficient of burned fuel droplets in a boost engine.

The 95% confidence interval for the regression coefficient alpha is :

[ -0.1457 , 0.3133]

a) Test the null hypothesis
beta
= 0 against the alternative hypothesis
beta
different a 0 at the 0.05 level of significance

b) Construct a 95% confidence interval for the evaporation coefficient when the air velocity is 190 cm / s.

Extracted text: Velocidad del Coeficiente de aire (cm/s) evaporación (mm?/s) 20 0.18 60 0.37 100 0.35 140 0.78 180 0.56 220 0.75 260 1.18 300 1.36 340 1.17 380 1.65