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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
Does the pseudo random noise and the pseudo random signal the same?
both are same as both will repeat after some period distinguishing it from random noise/signal which will never repeat
What is the difference between double sampling and multiphase sampling?
DOUBLE SAMPLING
Definition:
A standard form of sample design for industrial inspection purposes. In accordance with the characteristics of a particular plan, two samples are drawn, n1 and n2, and the first sample inspected. The batch can then be accepted or rejected upon the results of this inspection or the second sample be inspected and the decision made upon the combined result.
Context:
The term has also been used somewhat loosely for what is called multi-phase sampling and the two-stage version of multi-stage sampling. There is a further usage whereby a first sample provides a preliminary estimate of design parameters which govern the size of the second sample to achieve a desired overall result.
MULTI-PHASE SAMPLING
Definition:
It is sometimes convenient and economical to collect certain items of information from the whole of the units of a sample and other items of usually more detailed information from a sub-sample of the units constituting the original sample. This may be termed two-phase sampling, e.g. if the collection of information concerning variate, y, is relatively expensive, and there exists some other variate, x, correlated with it, which is relatively cheap to investigate, it may be profitable to carry out sampling in two phases.
At the first phase, x is investigated, and the information thus obtained is used either (a) to stratify the population at the second phase, when y is investigated, or (b) as supplementary information at the second phase, a ratio or regression estimate being used.
Two-phase sampling is sometimes called "double sampling".
Context:
Further phases may be added if desired. It may be noted, however, that multiphase sampling does not necessarily imply the use of any relationships between variates x and y. The expression is not to be confused with multi-stage sampling.
Is there another way to have the same numbers in a multiplication combination that has 5 numbers?
yes
How many different 2 digit numbers can be formed from the digits 4 6 and 8?
6 if you don't repeat any.
What does it mean to make a conjuncture?
Conjuncture is basically a joining of objects words or phrases. So to make a conjuncture would be to join things together. In propositional calculus making a conjuncture would mean joining a string of statements together.
Example: given the two statements
IF All A's are letters;
And All letters are are in the alphabet;
then the Conjuncture would be
All A's are in the alphabet.
4/52 = 1/13
There are 4 sixes (the numerator)
There are 52 cards (denominator)
Reduce your fraction
You have 4 chances out of 52 that the card you pick will be a six (because there are 4 sixes in the 52-card deck)
Regarding intelligence what does the bell curve assert?
The IQ range. In regards to the IQ of 100 or perfectly average, an IQ of 0 or the far left of the bell curve (a.k.a nearly brain dead), and the IQ of 200 which would be the smartest human alive. If another person where to be born with more intelligence, greater than the individual(s) considered to be at the 200 mark the bell curve would move or spread out.
10 because 10 is the first 2 digit number out of all numbers.
What 3-d shape has 4 fewer faces than a cube?
There is no polyhedron that meets these requirements. But there are many possible non-polyhedral shapes: for example, a hemisphere, a cone, a torus (doughnut) sliced by a plane perpendicular to its axis.
What is an example of allopathic treatment for hives?
Mild cases of hives are treated with antihistamines, such as diphenhydramine (Benadryl). More severe cases may require such oral corticosteroids prednisone. Topical corticosteroids are
Why does twenty one divided by two thirds equal one point five?
beacause it does.Don't mess with math!
What scale is used for the line plot?
The scale that you find appropriate. If you have a plot of line distances between cities for example you may use a scale 100000 to 1.
What are the features of a binomial distribution?
An experiment with only two outcomes ("success" and "failure"), a constant probability of success, a number of independent trials.
Then, if the probability of a success in a trial is p, the probability of r successes in n trials is
nCr*pr*(1-p)(n-r) for r = 0, 1, 2, ..., n.
In case the super-and sub-scripts do not work, that is
n!/[r!*(n-r)!]*p^r*(1-p)^(n-r)
What is the difference between a Statistical Question and a Research Question example please?
The research question is what your research is trying to explain/find answer. It generally attempts to find a way to relate your experiment with a target population (usually humankind).
The statistical question deals with your specific experiment as in how your experiment affects your sample population. It is essentially what you are trying to determine.
Example:
A company has developed a new pesticide designed to control pine beetles in the coniferous forests, but the law requires that it's effect on fish populations is tested first before it can be released. Thus, we'll test the pesticide on the mortality of a chose fish species in our lab.
Research Question: To what extent will the use of the new pesticide harm native fish poplulations?
Statistical Question: How does the pesticide, when introduced to the water source, affect the fish we have in our lab?
The first digit can be any one of six. For each of these . . .
The second digit can be any one of the remaining five. For each of these . . .
The third digit can be any one of the remaining four.
Total number of possible arrangements is (6 x 5 x 4) = 120 .
But you used the word "combinations", which has a very specific meaning when
working with this type of exercise. "Combination" means a group of items that's
unique but the order in which they appear doesn't matter. If you're looking for
'combinations', then 123, 132, 231, 213, 312, and 321 are all the same combination.
In that case, there are only 20 unique 3-digit combinations from 6 digits. Each of those
can be arranged in 6 different orders, which gives you the '120' calculated above.
