Why do scientists often take more than one representative sample

A representative sample is a reflection of the characteristics of the certain group ( population) as a whole. Sample size is the number of representative samples (individual pieces of data) used to calculate a set of statistics. The greater this number the better the determination of the average values of their data. Having greater number of samples also avoids errors from testing a small number of possibly atypical samples.

Representative Samples are expected to reflect qualities or let's examine a bit of the key reasons why scientists use this every person from a people. The greater the precedent is, the more likely it will absolutely reflect what exists in the people. The individual coincidentally, used a system ordinary to mathematicians and analysts called Sampling. Specialists use reviewing to get a measure of things they can do with critical exertion count. Scientists screen the change (addition or decrease) of masses numbers to settle on decisions about issues that impact people.

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explanation:

plate tectonics and volcanic euptions

over time, plate tectonic processes cause continents to move to different positions on the globe.

for example, britain was near to the equator 300 million years ago, and therefore was hotter than it is today. for further details look at our climate through time poster or online map.

the movement of the plates also causes volcanoes and mountains to form and these too can contribute to a change in climate.

mountain ranges formed by plate tectonics. large mountain chains can influence the circulation of air around the globe, and consequently influence the climate.   warm air might be deflected somewhere cooler by the mountains.

a. population growth is decreasing

-2

+4

-10

-3

-8

-3

so the population decreased by 24 because 3+3+8+10+2=26-2=24.

hoped i !

explanation: