Start learning 50% faster. Sign in now
Get Started with ixamBee
Start learning 50% faster. Sign in nowStratified sampling is ideal for situations where the population can be divided into distinct subgroups, or "strata," each representing a specific characteristic, such as age or income level. In stratified sampling, the population is split into these strata, and random samples are drawn from each to ensure proportional representation. This approach is especially useful when the subgroup characteristics are expected to influence the analysis, as it reduces sampling error and enhances the precision of the results. Option A is incorrect because simple random sampling does not ensure representation of subgroups. Option B is incorrect as systematic sampling selects every nth individual, which does not account for subgroups. Option C is incorrect because cluster sampling involves dividing the population into clusters, but it does not ensure proportional representation within subgroups. Option E is incorrect as convenience sampling lacks structure and does not aim for representativeness.
A person sees a train passing over 4 km long bridge. The length of the train is half that of bridge if the train clears the bridge in 4 mins. What is th...
600 metre long train ‘A’ is running with a speed of 57.6 km/hr. Train ‘B’ which is 641 metre long is running with a speed of 90 km/h in opposite...
Train P travelling at 58 km/hr crosses another train Q, having three fourth of its length and travelling in opposite direction at 32 km/hr in 14 seconds...
A train with a length of (p + 60) meters takes 30 seconds to cross a platform that is (q + 60) meters long while traveling at a speed of 20 meters per s...
Two trains 180 metres and 120 metres in length are running towards each other on parallel tracks, one at the rate 42 km/hr and another at 30 km/hr. In h...
200 metre long train ‘A’ can cross a platform of length 180 metres in 10 seconds. If the speed of train ‘B’ is 6 m/s more than that of train ‘...
Train M, ‘x’ metres long crosses (x – 35) metres long platform in 25 seconds while train N having the length (x + 35) metres crosses the same plat...
Two trains 200 metres and 100 metres in length are running towards each other on parallel tracks, one at the rate 50 km/hr and another at 40 km/hr. In h...
Train M, ‘x’ metres long crosses (x – 40) metres long platform in 20 seconds while train N having the length (x + 40) metres crosses the same plat...
Train A. running at the speed of 80 km/hr crossed train B. running at the speed of 70 km/hr in the opposite direction. Both trains finish crossing each ...