Standard deviation helps planners and administrators to arrive at a figure that could be used to determine a range that can effectively describe a given set of numerical information/data; and based on which a decision concerning a system of those data can be made.
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Explain write ing decimals in Standard Form = (In number format like this... EXAMPLE: Two and two tenths is, (IN STANDARD FORM : 2.2) !
Probably to save space and ink ! For example they would write ten million pounds as £10M instead of £10,000,000
Descriptive statistics give information regarding a data set. For example, any graph, the mean, median, and mode, standard deviation, range, and variance are all descriptive statistics. Inferential statistics is using a representative sample from a population to say something about that population. For example, for presidential polls, not everyone in the country is called and asked who they plan to vote for. Whoever does the surveying picks a sample that should fairly represent the population as a whole, and just asks those people. Depending on the sample size, the surveyor can then determine how accurate the results are, and use them to generalize to the population as a whole.
I'm sorry, but it seems like there may be a typo in your question. "Addesence" does not appear to be a standard English word. If you could provide more context or clarify the term you are referring to, I would be happy to help explain its meaning.
Explain how to disentangle hair after shampooing and explain the importance of considering the cuticle scales: