A random sample of size is 50 is selected from a known population with a mean of 13 and a standard deviation of 3.3. Samples of the same size are repeatedly collected, allowing a sampling distribution of sample means to be drawn. What is the approximate standard deviation of the sample means?
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Disadvantages of Plastics
Natural decomposition of plastic can last from 400-1000 years and few types of plastics are non-degradable as well.
Plastic materials clog waterways, oceans, seas, lakes etc.
Many animals eat plastic materials and die.
Plastic is widely used in packaging.
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