2025/2026 Exam Comprehensive
1
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The next several questions are based on analysis of the dataset download
provided on the course page where you launched the quiz module. The
data are from a 2-level full factorial experiment with 2 replicates to evaluate
the effect of three factors, A, B and C on the life of a product. Analyze the
data and use your conclusions to answer the next few questions.
Which main and interaction effects have a significant impact on the life of
the product? Use a 5% significance level to make your decision.
A) C, AC, BC
B) B, C, BC
C) B, C, AC
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, D) A, B, C, AB
E) A, C, AC - 🧠 ANSWER ✔✔C) B, C, AC
2
Which of the following is true of the effects identified as significant in the
previous question?
A) B, C and AC have a positive effect on Life.
B) B and C have a negative effect while AC has a positive effect on Life.
C) B, C and AC have a negative effect on Life.
D) AC has a negative effect while B and C have a positive effect on Life.
E) It is impossible to tell the direction of the effect. - 🧠 ANSWER ✔✔D) AC
has a negative effect while B and C have a positive effect on Life.
The final (reduced) model consists of the significant factors and any main
effects to preserve hierarchy. What is the final model equation for the factor
effects in coded units?
A) 17.47 + 0.81*A + 4.19*B + 3.56*C - 0.44*AB - 6.06*AC - 1.19*BC -
1.81*ABC
B) 28.64 + 0.67*A + 3.43*B + 2.92*C - 4.97*AC
C) 28.28 + 0.66*A + 3.39*B + 2.88*C - 4.91*AC
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED