Question

Two factors, temperature and time factors are investigated. The response values are given.

a. Develop a factorial design square using the Excel spreadsheet.

b. Draw the main effects plot

Temperature	Time 10	Time 15	Time 20
70	26	40	55
70	27	41	54
100	37	57	78
100	38	58	77

Answer 1

Solution:

a) By using Excel spreadsheet :

b) The main effect plot :

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