CUET Mathematics 2025 15 May Shift 1 PYQs

Which of the following are types of "statistical inferences"?

(A) Point estimation

(B) Interval estimation

(C) Marginal estimation

(D) Hypothesis testing

Choose the correct answer from the options given below:

If we reject the null hypothesis when it is true, we might be making

Let two independent random samples of sizes $n_1$ and $n_2$ respectively have been drawn from the same normal population. Let $\bar{x}_1$ and $\bar{x}_2$ be the means and let $s_1$ and $s_2$ be their standard deviations. In order to test whether the the two sample means $\bar{x}_1$ and $\bar{x}_2$ differ significantly or not, the t-test statistic is given by