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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 primary purpose of the mean absolute deviation in forcasting?
to measure forecast accuracy.
Assuming the red and blue spinner has an equal number of red and blue spots, the odds of spinning blue is 50%. On the other spinner, the odds of an odd number is 67%. Combined, the odds of spinning blue and an odd number is 33%. (50% times 67%)
What if i have an even set of numbers when I'm trying to work out the median?
Take the mean (or average) of the two middle numbers.
Why is it often desirable to take samples?
Samples are often used as all possible data could be impractically large to procure.
For instance, if I wanted to find out the average weight of frogs in a lake, I could drain the entire lake, use a chemical spray to immobilise all frogs, and then weigh each one individually, but that would be a mammoth task. Fencing off a section of the lake and taking a sample would be considerably cheaper, less time consuming, and more practical, and would only give us a slightly less accurate result.
Another issue is that people often are unwilling/unable to respond to a survey. If we tried to get the shopping habits of everyone going into a shop, many will be in a hurry or just plain not want to be surveyed. For this reason, the results will end up being incomplete anyway, so the person may as well set clear qualities she wants a sample to have.
"Top sample" typically refers to a sampling method or a specific example that represents the highest quality or the best characteristics of a group. In various contexts, it can denote the most influential, significant, or relevant samples in research, data analysis, or product selection. For instance, in music or art, a top sample might highlight the most celebrated works or styles within a genre.
khadija is really a very nice noun as Sarra and other names are or may be better
Over 140 - Genius or near genius
120 - 140 - Very superior intelligence
110 - 119 - Superior intelligence
90 - 109 - Normal or average intelligence
80 - 89 - Dullness
70 - 79 - Borderline deficiency
Under 70 - Definite feeble-mindedness
Its a form of disreputable... As in, not reputable... lacking in respectability... This term means direputable.. As in not reputable... or lacking in respectability...
No, many crimes go unreported and often undiscovered. Statistics on crime only deal with the information available at the time.
There are many strengths and limitations to official statistics such as the British Crime Survey (BCS) and the Official Crime Survey (OCS).
Official statistics surprisingly do not reveal the full extent of the crime that happens in Britain, the left over crime that is not known to the public as a whole or shown in the OCS, is called the 'dark figure of crime'. However the BCS goes a little further to reveal some of the 'dark figure of crime' in the fact that the victims of crime are interviewed, rather than the police reporting the crime. This in itself has strengths and limitations such as the fact that the no one under the age of sixteen is interviewed for the BCS meaning that the results are not one 100% representative. Also the police may choose not to report because, for example, the crime is seen as too 'trivial/minor' and people sometimes don't actually report a crime to the police as they may be too embarrassed, i.e. when men are abused by women or for fear of reprisals, thus some crimes don't appear in the statistics.
The BCS gives a more accurate picture of the true extent of crime because it compares police data with the BCS. This is highly advantageous as the BCS has a very large stratified sample of 650 interviews in each police area and also boost samples. A boost sample is when not-white minority ethnic groups are interviewed for the BCS as numbers in the main sample may not have been high enough to draw conclusions. The response rate for the BCS is also very good (80 %+).
What is a experimental sample?
An experimental sample is an experiment that is just a sample of what you are looking for.
Difference between discrete and continuous?
A continuous variable is one that can take any value within an interval (or a set of intervals). A discrete variable is one that can only take certain values.
Some further notes:
* Often a discrete variable takes integer values, but that is not necessary.
* Neither discrete nor continuous variables need be limited to a finite number of possible values.
* Frequently, continuous variables are continuous only in principle, and the measuring instruments or recording make them discrete. Eg your height is continuous but as soon as it is recorded as 1.75 cm or 5'9", it is made discrete.
What are Chile's birth and death rates?
Chile's birth rate is 14.46/1000 (July 2010 estimate).
Chile's death rate is 5.9/1000 (July 2010 estimate).
it is the same as the English word "Daedal" which means skillful or ingenius
dei means ingenius. dara means clay.
I don't know where the previous answerer got his Japanese but wrong.
Dei means day and Ara means flaw. Also the word Deido means mud so it may be an adaptation of the word for mud as his art is made of clay
A frequency is when a number occurs the most like m i s s i s s i p p i m1 i 4 s 4 p2 i is the frequency
The following is a good discussion of the phrase: http://listserv.linguistlist.org/cgi-bin/wa?A2=ind0304a&L=ads-l&P=7859
Can there be no mode in a set?
Not generally useful. With a set we usually mean a collection of unique elements. The mode of a collection is the element found to be most frequent. Trivially, one could perhaps say the mode of a set is always the set itself (each element representing an answer). Note that the term 'dataset' often used in statistics is not a real set.
