STA215 Statistics II

Statistics IITU Board 2082

The following sample data were collected to determine the relationship between two processing variables and the current gain of a transistor in an integrated circuit. Diffusion time in hours (x1​)…

10

The following sample data were collected to determine the relationship between two processing variables and the current gain of a transistor in an integrated circuit.

Diffusion time in hours (x1​)
Sheet resistance ohm-cm (x2​)
Current gain (y)
1.5
65
5.2
1.2
140
9.8
0.5
70
7.5
2.7
92
10.8
1.6
123
12.6
0.3
105
9.1

  • i) Fit a regression equation and use this equation to estimate the expected current gain when the diffusion time is 1.8 hours and the sheet resistance is 90 ohm –cm.

  • ii) Compute the coefficient of multiple determination and interpret its value.

A worked answer is on its wayMeanwhile, read the Statistics II notes for this topic.

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