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Part BCSIR NET December 2024symmetric-means-as-many-blocks-as-treatments

Symmetric means as many blocks as treatments

Consider the following design where the columns represent blocks and the letters represent treatments — block 1: A, B; block 2: C, D; block 3: A, C; block 4: B, D; block 5: A, D; block 6: B, C; block 7: A, E; block 8: B, E; block 9: C, E; block 10: D, E. Then, which of the following statements is NOT true?

  1. A.The design is a balanced incomplete block design.
  2. B.The design is connected.
  3. C.The design is binary.
  4. D.The design is symmetric.✓ Correct

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, and why this one tests execution slip.

See pricing

50 are analysed free — try those first.

The trap it tests

Execution slip

The idea was right. The computation was not.

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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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