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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.
36,756 Questions
What is the probability of getting heads one-half N times when flipping a coin N times?
If N is odd, the probability is 0.
If N is even, suppose N=2M
then the probability is 2MCM*(1/2)2M which approaches 0 as N (or M) increases.
For N = 10, Prob = 0.1762
For N = 20, Prob = 0.1254
For N = 30, Prob = 0.1026
For N = 80, Prob = 0.0630
How do you find out the total current in PCB?
a: usually taking the high side of the buss or the return and measuring the current
Which number when divided by 5 7 and 9 has a remainder 3 5 and 6?
5x + 3; 8,13,18,23,28,33
7x + 5; 12,19,26,33
9x + 6; 15,24,33
33
What is a expresion that conains at least one variable?
hi
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The above may not have been serious, but it is correct - there are two variables, h and i. The following is also a correct answer:
3h2 -5i
What does mean median in math?
The term median refers to an average value indicated by the middle number or numbers in a series. It can be different from the "mean", which is the average value found by adding the numbers and dividing.
Where there is an odd number of values, the median is the central (middle) value.
For example, in the set [ 1, 2, 7, 50, 100 ] the median value is 7. There will be as many values less than the median as there are greater than the median. (if you have duplicate values, more than one may be equal to the median)
Where there is an even number of values, the median is the mean (average) of the two central values. For example, in the set [ 1, 2, 7, 9, 50, 100 ], there are two central values, 7 and 9. The median would be 8, and again there will be as many values less than the median as there are greater than the median.
To find the median : put your numbers in order by their value, and count the number of values. Divide the number of values by two to locate the center value or values. Where the number of values is even, add and average the two in the middle.
Example : values [ 27, 18, 3, 99, 55, 1, 16 ]
Ordered set : [ 1, 3, 16, 18, 27, 55, 99 ]
Median : 18
There are 6 kids in my family and they r 13 12 11 9 7 and 7 could we b a reality show and How?
um no one would wana watch that show i would rather watch a program on the tree octopus
When is the next Friday the 13th after 2012?
September 2013, Friday the 13th. Oh, and download the free app "app trailers" an I device(like an iPod or something) enter "giftcard9" as a promo code then you will be making free money. Seriously try it. I'm not a robot.
What is the differences between dependent variables and controlled variables in an experiment?
Controlled variables are things that may effect the outcome of an experiment, like temperature are pressure or the amount of some substance used.
Dependent variables are those which change due to the conditions mentioned above.
These might be speed of the reaction, or the quantity of some product.
How do you make -2 using all four operations and only the numbers -1 -2 -3 -5 and -7?
[(-2) + (-1)]/(-3) * [(-7) - (-5)]
How many triangles are on a pyramid?
A pyramid is a generic term used to describe a polyhedron with a polygonal base and a number of triangles rising from that base to meet at an apex. A pyramid whose base is a polygon with n-sides (or vertices) has n+1 faces, n+1 vertices and 2n edges, where n ≥ 3.
How do you determine the units of a problem using dimensional analysis?
I suggest you search for some examples to get the general idea. Basically, you convert all units to generic descriptions such as [length], [time], [current], etc.; then you combine them. If you add a length to another length, you get a length again, so:
[length] + [length] = [length]
Similarly,
[length] - [length] = [length]
Please note that:
1) This is different from regular addition or subtraction.
2) You can't add or subtract different types of units. For example, if in a formula you are supposed to add a speed and an acceleration, you get:
speed + acceleration
= [length] / [time] + [length] / [time]2
... which can't be added. If you get something like this, something is wrong with this formula. Such formulae might be used as "rule-of thumb" formulae, and might sometimes give good approximations - but they are not dimensionally correct.
On the other hand, if you multiply or divide units in a calculation, you get the regular product or quotient, for example:
[length] times [length] = [length] squared.
Give mathematical experssion for pascal triangle?
See link at bottom. Pascal's triangle begins with a 1 at the top. This is row 0. The first row of Pascal's triangle 1,1 corresponding to n = 1 and i = 1 and 2. The second row of Pascal's triangle is 1, 2, 1, corresponding to n = 2 and i = 1, 2, 3 If we have (x+y)^2, we have (1) x^2 + (2)xy + (1) y^2 so Pascal's triangle gives the constants in front of the variables. Also, ai = n!/[i! x (n-i)!] Example, 5th row third element is 10, which is calculated as 5!/[3! x 2!] = 5 x 4/2 = 10. http://en.wikipedia.org/wiki/Pascal's_triangle
'Latiskia' is Lithuanian for the phenomenon where upon a child defecates inside someone elses school bag and then drives the bag into the anus of a goat. After approximately 37 hours the faeces becomes rancid and can be smeared on my nan for a pleasant breakfast. This ritual usually takes place on the first weekend of the equinox when the great goat constellation is high to the south and the banana frog spawns in the drinking troughs.
They can be combined 720 ways
* * * * *
They can be permuted in 720 ways. There is only one combination.
What was tossed in the seventeenth century over the brides head?
I'm pretty sure it was a knife or something dangerous like that!?
What is the probability of getting two heads when you toss two coins?
If you toss the coins once only, it is 1/4.
It is called the faculty of 3 and written 3!
3! = 3 * 2 * 1
The same for 4! = 4*3*2*1 and so on...
