b. Estimate the correlation coefficient.
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APPLIED STATISTICS AND PROBABILITY FOR ENGINEERS
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In an article in IEEE Transactions on Instrumentation and Measurement (2001, Vol. 50, pp. 986–990), researchers reported on a study of the effects of reducing current draw in a magnetic core by electronic means. They measured the current in a magnetic winding with and without the electronics in a paired experiment. Data for the case without electronics are provided in
the following table.
See the attached photo
Answer the following:
a. Graph the data and fit a regression line to predict current without electronics to supply voltage. Is there a significant regression at α = 0.05? What is the P-value?
b. Estimate the
c. Test the hypothesis that ρ = 0 against the alternative ρ ≠ 0 with α = 0.05. What is the P-value?
d. Compute a 95% confidence interval for the correlation coefficient.
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