Teaching UGC NET Mock Test Series 2025 (Paper 1 & 2) Environmental Science Statistics and Modelling Attributes and Variables
Consider the following statements regarding sampling:
(a) The sample mean is an unbiased estimate of the population mean.
(b) For small samples, the sample variance is an unbiased estimate of the population variance.
(c) If we reject the null hypothesis when it is actually true, we commit the type-I error in testing the hypothesis.
Which of the above statements are correct?
1
(a) and (b) only
2
(a) and (c) only
3
(b) and (c) only
4
(a), (b) and (c) only