SEM is calculated simply by taking the standard deviation and dividing it by the square root of the sample size.

Standard error gives the accuracy of a sample mean by measuring the sample-to-sample variability of the sample means. The SEM describes how precise the mean of the sample is as an estimate of the true mean of the population.

As the size of the sample data grows larger, the SEM decreases vs. the SD. As the sample size increases, the sample mean estimates the true mean of the population with greater precision.

1.help understand the Adsorption criterion as applied in the recover vapours of liquid hydrocarbons

2.what is your basic knowledge about the H₂S being absent from natural gas

3. . How much percentile of propane is present in natural gas?explain

4.relate the Natural gas obtained from rocks to the highest ignition temperature?

5.on the grounds of the oil fields analyse the natural gas majorly produced

6.sanalyse the alternative representation of the wet natural gas?explain

7. Which gaseous compound is present in natural gas?

8.what is the interlink between the Liquefied petroleum gas and the primary gaseous fuel?

9. Which is a major advantage of gaseous fuel over liquid and solid fuel?elaborate

10.discuss the Gaseous fuels are highly inflammable disadvantage of gaseous fuel?