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Statistics

Statistics deals with collecting, organizing, and interpreting numerical data. An important aspect of statistics is the analysis of population characteristics inferred from sampling.

36,755 Questions

A uniform distribution ranges from values 31 to 53. Calculate the mean of the distribution?

The mean of a continuous uniform distribution between bounds a and b has a simple formula: μ=a+b2 μ = a + b 2 .

(31+ 53 )/2 = 84/2 = 42

How much money do people spend on food monthly in the United States?

My source claims that the average American spends 12.4% of their income, or $6,133 dollars a year, on food. That's about $511 a month.

Source: see related link below for the source

How do find the median of 12 32 20 26 32 10?

First, you list the numbers in numerical order~ 10, 12, 20, 26, 32, 32. Then just find the number in the middle. If there are two in the middle (as in this example) you find the mean of those two numbers, which would be 23.

Is it true In portfolio analysis you often use historical returns and standard deviations despite the fact that you are interested in future data?

This is true because the main concept of investment, especially the quantitative branch of investment, is to predict future returns based upon historical data.

A can be any What a chance a person takes without knowing what the outcome will be the degree of probability or likelihood that something will happen a dangerous chanc?

Anyone who is going to answer this will need to know what choices there are for the answers. Without knowing this they will not be able to know which cause something dangerous to happen.

Comparision between binomial plus normal plus hypergeometric distribution?

The binomial distribution is a discrete probability distribution which describes the number of successes in a sequence of draws from a finite population, with replacement. The hypergeometric distribution is similar except that it deals with draws without replacement. For sufficiently large populations the Normal distribution is a good approximation for both.

If 63 out of 287 select a and 23 out of 301 select b then how many times is a more likely to be selected?

a is selected by 63 out of 287 - a rate of 63/287.

b is selected at a rate of 23/301.

Selection rate for a/selection rate for b = (63/287)/(23/301) = 0.2195/0.0764 = 2.8727

Ie a is likely to be selected 2.8727 times as often as b, or a is 1.8727 times more likely to be selected.

What does dhoom svalka mean?

It would be helpful if you would tell us, in your question, the language of origin of the phrase you are asking about.

If you toss a penny how do you think the coin will land heads or tails explain?

there is even chance of having heads or tails since there is only 1 head and 1 tail on a penny.