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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
The range.
Square of the deviation will be less if?
If the deviation is small ie if the distribution is packed close to the mean.
How you can indicate the current direction in the network?
If we go for the diagramatic representation then battery positive is represented by the long terminal and battery negative is represented by the short terminal then the direction of the current is given by an arrow from positive terminal to negative terminal
(Therotically electrons flow from negative to positive but we represent current flow from positive to negative. This is the sign convention )
What are the odds of getting an even number on an eight sided die four times in a row?
One half, 1:2, 1/2, etc...
How many 5 digit numbers are there with distinct numbers?
I suspect you mean "without repeated digits", and I'll answer it that way.
Here's how I would construct all the 5-digit numbers without repeated digits:
The first digit can be any one of 9 (1 thru 9 but not zero). For each of these . . .
The second digit can be any one of 9 (zero thru 9 but not the same as the first one). For each of these . . .
The third digit can be any one of the remaining 8. For each of these . . .
The fourth digit can be any one of the remaining 7. For each of these . . .
The fifth digit can be any one of the remaining 6.
Total number of possibilities = (9 x 9 x 8 x 7 x 6) = 27,216
4284
Range is the largest minus the smallest value; so 12 - 6 is range of 6.
How many equal groups of cards can be made from a standard deck of 52 cards?
52/1 = 52
52/2 = 26
52/4 = 13
52/13 = 4
52/26 = 2
52/52 = 1
6 groups. 1 group of 52 counts, right?
How do you find the maximum of a set of numbers?
The maximum of a set of numbers is the largest number in the set.
The largest number you can form using all the digit with no repetitum?
How about 1 to the power 2 to the power 3 etc etc to the power 8 to the power 9?
Cluster sampling is sampling technique that is used when natural groups are evident. In one-stage cluster sampling (Elementary Statistics, p. 24, by Triola), all members of these selected clusters are surveyed. Rigorous rules to define members of the cluster are needed. A member can not belong to two clusters. Surveys of people conducted in geographical different areas of the country would be an example of cluster sampling. Because different definitions/ explanations exist, I've included three links for further reading. See the following links: http://stattrek.com/Lesson6/CLS.aspx?Tutorial=Stat http://en.wikipedia.org/wiki/Cluster_sampling http://www.answers.com/topic/cluster-sampling
What is the advantage of a one-tailed test?
A one tailed test allows you to test a one-sided hypothesis.
HOW you can simulat the poisson random measure?
A simple way of generating poisson random numbers is given by Knuth, in his book "The Art of Computer Programming" in the chapter on Seminumerical Algorithms. I can't quote it directly here, due to copyright and plagarism limitations, but the Related Link below contains a reference to it.
How do you convert a z-score into an x-score?
Suppose m is the mean and s the standard deviation of a random variable, X, which is normally distributed. Then, given Z,
X = m + sZ
How many possible outcomes are there rolling six sided cube twice?
- If each throw is unique, then there are 36 distinct outcomes(6 x 6 = 36).
- If each throw is not unique (you count 1-4 same as 4-1) then 21 different possible.
- If you're just interested in the sums, then 11 different possible (1+1 =2 up to 6+6=12)
But any time you want to calculate probabilities with two die throws, you need to use the 36 distinct outcomes.
What did joann carl fried rich gauss do to contribute to math?
Lots of stuff. Why don't you check his wikipedia page?
How do you work out speed using mean and median?
Mean is the average of a set of data points = (Sum of all data) / Quantity of Data
Median is the middle of a set of data points = Data whose index is the integer nearest ((Number of Data+1) / 2)
Example Data:
2, 3, 5, 3, 2
The mean = (2+3+5+3+2)/5 = 15/5 = 3
The median = Index((5+1)/2) = Index(6/2) = Index(3). The third item on our list is 5.
