Inferential Statistics · Class 12 Applied Mathematics · Chapter 5
📈 Inferential Statistics
CBSE Class 12 Humanities & Commerce · Applied Mathematics · Chapter 1
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📖Notes Deck
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Download PDF →📝Quick Drill
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Download PDF →Top question patterns · CBSE annual / SQP aggregate
| 82% | Construct a CI for μ given n, x̄, σ — Substitute into x̄ ± z·σ/√n; quote z for the stated confidence level. | 3 MARKS |
| 71% | One-sample z-test on a claimed mean — Always: H₀, H₁, α, z_calc, compare, decision, contextual conclusion. | 4 MARKS |
| 57% | Identify the sampling technique used in a scenario — Match to definitions; stratified = subgroup-proportional, cluster = whole groups picked. | 2 MARKS |
| 64% | State CLT and find SE for a sampling distribution — SE = σ/√n; CLT statement must mention 'large n' and 'regardless of population shape'. | 2 MARKS |
| 39% | Distinguish Type I vs Type II error in a real context — Type I = false alarm; Type II = miss. Anchor to the H₀ in the question. | 2 MARKS |
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