MCQ's on Confounding

MCQ's

 on 

Confounding

1. The factorial experiment is efficient, when the treatment combination is

i. Smaller

ii. Moderate

iii. Large

iv. Very Large  

2. In confounding the block obtained by  X1 + X2 + X3 = 0 mod 2 is called

i. Control block

ii. Experimental block

iii. Principle block

iv. Confounded block

3. In confounding, the higher order interaction is

i. Very important

ii. important

iii. Not important

iv. All of the above.

4. In 2^(k-1) factorial experiment …. Order of interaction is confounded with blocks.

i. Lowest

ii. Medium

iii. Highest

iv. Main effects.

5. In 2^(k-2) factorial experiment the …… number Order of interaction is confounded with blocks.

i. One

ii. Two

iii. Three

iv. No one

6. The number of generators (q) to confound 2^6 factorial experiment in 8 blocks.

i. 2

ii. 3

iii. 4

iv. 6

7. The generalized interaction of the two generators ABC and ADE is

i. ABCDE

ii. A^2 BCDE

iii. BCDE

iv. ABDE

8. A treatment which cannot be estimated at all from the selected treatment combination is called defining

i. Contrast

ii. Aliases

iii. Generator

iv. None of them

9. A defining contrast that uses for spotting a complete factorial experiment into two fractions is called

i. Contrast

ii. Aliases

iii. Generator

iv. None of them

10. If the main effects are confounded or aliased with factors interactions, the resolution of the design will be:

i. II

ii. III

iii. IV

vi. V

11. Which of the following design does not exist.

i. Resolution II

ii. Resolution III

iii. Resolution IV

vi. Resolution V

12. If the main effects and 4 factors interaction are confounded or aliased, the resolution of the design will be:

i. II

ii. III

iii. IV

vi. V

Resolution of a Design

The resolution of a design indicates its power and ability to separately estimates effects of the factors and interactions denoted by Roman digits.

If some main effects are aliased or confounded with 4 factors interaction, the resolution of the experiment will 4 + 1 = 5 and represented by V. if some main effects are confounded with two factor interactions the resolution of the experiment will 2 + 1 = 3 and represented by III. The resolution 2 does not exist because it confounded the main effects.

Resolution
III	IV	V
Main effects and two factors’ interactions are confounded or aliased.	·         The main effects are aliased with three interactions, and ·         Two factors’ interactions are aliased with some other two factors interactions.	·         The main effects are aliased with four interactions, and ·         Two factors’ interactions are aliased with three factors interactions.

• Read More: Incomplete Block Design