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Explanation: Selection bias occurs when certain segments of the population are over- or under-represented in the sample. Stratified sampling effectively combats this issue by dividing the population into well-defined strata and sampling proportionally from each. This ensures balanced representation, minimizes bias, and provides a clearer reflection of the entire population. This technique is particularly useful in diverse populations, where subgroups may have different characteristics relevant to the analysis. Option A: Convenience sampling often increases selection bias as it does not account for representativeness. Option B: Systematic sampling can reduce bias but may inadvertently introduce patterns if the population is ordered. Option D: Self-selection introduces significant bias as it relies on participant interest, skewing the sample. Option E: Historical data may not be representative of current conditions, leading to bias in conclusions.
What is the total distance between point O and point K?
Starting from Mall, Naveen walks 14km towards west. He then turned right and walks 12km. Then he turned left and walks 10km to reach Salon. From there,...
Point L is 15 m north of point M. Point P is 5 m south of point Q. Point P is 8 m east of point O which is 11 m south of point N. Point R is 20 m north ...
P is in which direction with respect to B?
What is the shortest distance between J and N?
Priya walks towards west direction, after covering 12m, she turns right. She then walks 3m and then turns left. She then walks 6m and then turns left. S...
What is the direction of point N with respect to point T?
In a certain code language, "GONE" is written as "123" and "DO" is written as "57". How is "WERE" written in that code language?
Rakhi moved a distance of 65 metres towards the north. She then turned to the left and walked for about 35 metres, turned left again and walked 80 metre...
What is the direction of point X with respect of point V?