22.
Assertion (A) Median is simply the middle value when the data have been arranged in ascending or descending order.
Reason (R) Median refers to middle value in the distribution.

25.
In badminton practice session, the probability that the player A serves properly is 0.8 and that he player B serves properly is 0.9. If there are only two players, then find the probability that it is serves properly.

27.
Two events are said to be independent, as per the theory of probability, if the occurrence of one

29.
Arrange the following statements in chronological order.
1. Normal distribution was discovered by English mathematician De Moivre.
2. Rediscovered and applied in Science, both natural and social and in parochial affairs by Laplace.
3. Normal distribution was extensively development and utilised by Carl Friedrich Gauss.

30.
Consider the following statements.
Statement-I: When the null hypothesis is true but as per the hypothesis-testing, it is rejected, it is known as beta type error in hypothesis testing.
Statement-II: Chi-square test is exclusivelya non-parametric test.