An article in the IEEE Transactions on Instrumentation

and Measurement [“Direct, Fast, and Accurate Measurement

of V_T and K of MOS Transistor Using VT-Sift Circuit”

(1991, Vol. 40, pp. 951–955)] described the use of a simple

linear regression model to express drain current y (in milliamperes)

as a function of ground-to-source voltage x (in volts).

The data are as follows:

(a) Draw a scatter diagram of these data. Does a straight-line

relationship seem plausible?

(b) Fit a simple linear regression model to these data.

(c) Test for significance of regression using α = 0.05. What is

the P-value for this test?

(d) Find a 95% confidence interval estimate on the slope.

(e) Test the hypothesis H₀: β₀ = 0 versus H₁: β₀ ≠ 0 using

α = 0.05. What conclusions can you draw?