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Part CCSIR NET December 2024every-pair-appears-exactly-once

Every pair appears exactly once

Consider the following design where the columns represent blocks and the letters represent treatments — block 1: A, B, E; block 2: C, D, E; block 3: A, C, F; block 4: B, D, F; block 5: A, D, G; block 6: B, C, G; block 7: E, F, G. Then, which of the following statements are true?

  1. A.The design is a balanced incomplete block design.✓
  2. B.The design is not connected.
  3. C.The design is binary.✓
  4. D.The design is symmetric.✓

You have the answer. Trap Analysis is why the other three were written.

Not a worked solution repeated four times — the specific reasoning error each wrong option was built to reward.

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50 are analysed free — try those first.

More on this topic

The chapter behind this: Design of experiments essentials — free to read

From Sampling and Design of Experiments › CRD, RBD, LSD essentials

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