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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
What is the relation between median and D 50 value?
For a set of data, the 50% percentile measure is the median. I've seen this referred to as the P50 measure. It is also referred to as the "d5" measure or the fifth decile. or Q2 measure of the second quartile. See related links.
What is 3738564856478 times 64743547456374573564?
242,047,951,204,117,589,582,504,112,947,592
(242 nonillion, 47 octillion, 951 septillion, 204 sextillion, 117 quintillion, 589 quadrillion, 582 trillion, 504 billion, 112 million, 947 thousand and 592)
What is an example you can test for regression?
As the demand increases, so does the supply. You must have a data set of demand and supply measured on several days.
The causes of muticolinearity in multiple regression?
There is multicollinearity in regression when the variables are highly correlated to each other. For example, if you have seven variables and three of them have high correlation, then you can just use one them in your dependent variable rather than using all three of them at the same time. Including multicollinear variables will give you a misleading result since it will inflate your mean square error making your F-value significant, even though it may not be significant.
How do you convert grams per square yard to grams per square meter?
Multiply by the conversion factor 1 square yard equals 0.836127 m².
How much more likely is a car crash to happen on wet roads?
50/50 really if you think about it depends on the driver.
Yellowknife is a city in Northern Canada. It is the capital of the Northwest Territories aloing the shore of Great Slave Lake approximately 250 miles south of the Arctic Circle. Gold was found in the area in 1935.
Why you need to give importance in math?
Math is used in most every line of work. Being a musician, I use math all the time - note values, time signatures, etc. Hard to think of any occupation that doesn't use math in one form or another.
Besides no repeats, we also assume that the first digit can't be zero.
The first digit can be any digit except zero ... 9 choices. For each of those . . .
The second can be any one of 9 digits ... zero, and the 8 that were not the first one. For each of those . . .
The third can be any one of the 8 remaining digits. For each of those . . .
The fourth can be any one of the 7 remaining digits. For each of those . . .
The fifth can be any one of the 6 remaining digits. For each of those . . .
the Sixth can be any one of the 5 remaining digits.
The total number of possibilities is: (9 x 9 x 8 x 7 x 6 x 5) = 136,080 .
If there were no restrictions, then 6 digits could make 1,000,000 different numbers.
The restrictions have eliminated 86.4 percent of them.
Probability of die being greater then 0?
assuming that it is a regular die with numbers 1-6 on them the probability is 1
Derivation of variance of non-central chi-square disribution?
The browser available here is not suited for the purpose. You will need to refer to a statistical site or even a book!
It's possible, however it would be impracticable, because the reason for such statistical profile would be futile or useless. And yet, it was done by Ethnologue, proving it was not futile.
I've included a couple of links. Statistical theory can never tell you how many samples you must take, all it can tell you the expected error that your sample should have given the variability of the data.
Worked in reverse, you provide an expected error and the variability of the data, and statistical theory can tell you the corresponding sample size.
The calculation methodology is given on the related links.
When 2 dice are rolled what is the probability of getting a 5?
If you want 5 on both dice then it would be 2 out of twelve. If you want just 5 on one, 1 of six.
Pay attention in school next time! :p
Why Central Limit Theorem does not work for sample max?
Because other than in a degenerate case, the maximum of a set of observations is not at its centre! And the theorem concerns the distribution of estimates of the central value - as the name might suggest!
How tall would a house of card be if you used a fifty-two card deck?
Depends on the architectural design. There could be 1 to n stories (levels) in the house. The cards could be laid on the short or long side. The angle at which the cards are leaned toward each other could differ.
(I think he meant using the original Pyramid type stacking)
What is the mean for the family of 12 8 6 5 4 people?
Mean is just another word for average. To find the mean you add each number together: 12+8+6+5+4=35. Then you take that sum and divide it by how many families there are. In our case there are 5. So 35/5 which equals 7.
The mean of these families is 7.
