An investigator has used a multiple regression program on 20 data points to obtain a regression equation with 3 variables. Part of the computer output is:

a. 0.80 is an estimate of ___________.

b. 0.10 is an estimate of ___________.

c. Assuming the responses satisfy the normality assumption, we can be 95% confident that the value of β₂ is in the interval,_______ ± [t.₀₂₅ ⋅ _______], where t.₀₂₅ is the critical value of the student's t distribution with ____ degrees of freedom

Variable Coefficient Standard Error of bi 1 0.45 0.21 2 0.80 0.10 3 3.10 0.86 Table 13.5