Match List-I with List-II
| List-I | List-II | ||
| (A) | It describes the accuracy of a sampling method. | (I) | Confidence interval |
| (B) | It describes the uncertainty of a sampling method. | (II) | Hypothesis |
| (C) | It is used to express the precision and uncertainty of a sampling process. | (III) | Margin of error |
| (D) | An educated guess which needs to be tested. | (IV) | Confidence level |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (A) - (III), (B) - (IV), (C) - (I), (D) - (II)
(A) It describes the accuracy of a sampling method.
This matches (III) Margin of error. The margin of error is the range of values above and below the sample statistic; the smaller it is, the more accurate (precise) the estimate.
(B) It describes the uncertainty of a sampling method.
This matches (IV) Confidence level. A 95% confidence level means that if the sampling were repeated many times, about 95% of the intervals would contain the true value; it tells how uncertain the method is.
(C) It is used to express the precision and uncertainty of a sampling process.
This matches (I) Confidence interval. A confidence interval combines both: it is the statistic ± the margin of error (precision), stated at a confidence level (uncertainty).
(D) An educated guess which needs to be tested.
This matches (II) Hypothesis. A hypothesis is a statement about a population that is tested using sample data.
So the matching is (A)-(III), (B)-(IV), (C)-(I), (D)-(II).
CBSE Applied Mathematics (Class XII):
Confidence Interval
