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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
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.
How many 4 digit permutations and combination can be made from 46913?
Given the individual digits: 4, 6, 9, 1, and 3,
the number of 4-digit permutations is (5! / 1!) = (5 x 4 x 3 x 2) = 120 .
The number of combinations is [ 5! / (1!4!) ] = 5 .
How are the Composite Indexes made?
The government indexes are made by averaging the behavior of the different indicator series that make up each composite series.
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.
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)
How do you make numerical data?
You can code the data.
For example, male = 1, female = 2.
Or
Strongly Agree = 5
Agree = 4
Neither agree nor disagree = 3
Disagree = 2
Strongly Disagree = 1
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!
What is time series all about?
Answer: it tells the time about
something in different ways
Answer: It's a graph that shows how something changes over time. You may want to check the Wikipedia article "Time series" for more information.
What kind of shape that hAVE FOUR sidEs?
Quadrilateral.
Examples -
Rectangle
Square
Parallelogram
Rhombus
Trapezoid (US) = Trapezium (UK)
What is the probability of rolling a 1 or a 5 on two dice?
It is 1 - Prob(not rolling a 1 nor a 5 on either die)
(4/6)2 = (2/3)2 = 4/9 = 0.444... recurring.
