An article in Electronic Packaging and Production (2002, vol.42) considered the effect of X-ray inspection of integratedcircuits. The radiation dose (rads) were studied as a function ofcurrent (in milliamps) and exposure (in minutes).The data are inexcel file uploaded to Moodle. Name of the file is “Assignment 4Dataâ€. Use a software (preferable MINITAB) to answer the followingquestions
Part 2. Now, add current to the model and perform multipleregression analysis. (Include the output in your pdf file.)
a) Write the fitted model.
b) Is the model overall significant? Test at significance levelof 5%.
c) Is current a significant variable for the model? Test atα=0.05.
d) Use the model to estimate mean radiation dose when thecurrent is 25 mA and exposure time is 30 seconds.
e) Do you observe an improvement in coefficient ofdetermination? Explain
***Assume that you have data of radiation dose, exposure timeand mA for 40 samples. Can you solve the problem above usingminitab amd show the steps please?
| Rads | mA | Exposure Time |
| 7,4 | 10 | 0,25 |
| 14,8 | 10 | 0,5 |
| 29,6 | 10 | 1 |
| 59,2 | 10 | 2 |
| 88,8 | 10 | 3 |
| 296 | 10 | 10 |
| 444 | 10 | 15 |
| 592 | 10 | 20 |
| 11,1 | 15 | 0,25 |
| 22,2 | 15 | 0,5 |
| 44,4 | 15 | 1 |
| 88,8 | 15 | 2 |
| 133,2 | 15 | 3 |
| 444 | 15 | 10 |
| 666 | 15 | 15 |
| 888 | 15 | 20 |
| 14,8 | 20 | 0,25 |
| 29,6 | 20 | 0,5 |
| 59,2 | 20 | 1 |
| 118,4 | 20 | 2 |
| 177,6 | 20 | 3 |
| 592 | 20 | 10 |
| 888 | 20 | 15 |
| 1184 | 20 | 20 |
| 22,2 | 30 | 0,25 |
| 44,4 | 30 | 0,5 |
| 88,8 | 30 | 1 |
| 177,6 | 30 | 2 |
| 266,4 | 30 | 3 |
| 888 | 30 | 10 |
| 1332 | 30 | 15 |
| 1776 | 30 | 20 |
| 29,6 | 40 | 0,25 |
| 59,2 | 40 | 0,5 |
| 118,4 | 40 | 1 |
| 236,8 | 40 | 2 |
| 355,2 | 40 | 3 |
| 1184 | 40 | 10 |
| 1776 | 40 | 15 |
| 2368 | 40 | 20 |
