Suppose the regression of Output per Hour on employee Age yields a coefficient of -4.3 with a standard error of 1.2. Which of the following equations would properly report the 95% confidence interval for the population coefficient?
A) -4.3 ± 1.96
B) 0 ± 1.96(1.2)
C) -4.3 ± 1.96(1.2)
D) -4.3 ± 1.65(1.2)

Question

Quizplus · Accepted Answer

We can use the formula: 
Coefficient ± (Critical Value) x Standard Error

For a 95% confidence interval, the critical value is 1.96.

Plugging in the values given: 
-4.3 ± 1.96(1.2)

This gives the range from -7.68 to -0.92.

Therefore, the correct answer is C.

Suppose the Regression of Output Per Hour on Employee Age