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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
Does the variance provide a succinct summary of raw data?
Your question is a bit difficult to answer, as "succinct" is usually a quality in reference to a description or explanation. It is defined by Webster's dictionary as "marked by compact precise expression without wasted words." See related link.
For this reason, I have reworded your question as follows: Does the variance fully describe or summarize the raw data? The answer is no.
For any set of data, many statistical measures can be calculated, including the mean and variance. The variance or more commonly the square of the variance (standard deviation) is a very useful in identifying the dispersion of data, but is incomplete in fully describing the data. The mean is also important. Graphs can improve the summarization of data in a more visual manner.
A playing card is dropped 3 times What is the probability of it landing face up all three times?
1/2 * 1/2 * 1/2 or 1/8
Why are there fifty-two cards in a pack?
If your question refers to the structure of the cards, there are four suits, each with 13 cards:
A,2,3,4,5,6,7,8,9,10,J,Q,K
If your question refers to why these cards were selected, the popular answer is that there are four suits for the four seasons and thirteen cards in each because there are thirteen weeks in a season. As you can see, the 52 cards correspond with the fact that a year has 52 weeks.
Could the mean on the stem and leaf plot have a remander?
The mean can be an improper fraction but it cannot have a remainder.
Is it true that normal distribution is characterised by Standard deviation only?
No. You must have the mean ("average") as well.
What does population size means?
Statistics often requires one to make estimates of some measure (variable) about a set of units. The total number of such units is the population size.
Note that population, in this context, need not refer to people. If the study is about household expenditure on food (in some area), then the population is all households and the population size is the number of households (in that area). If the study is about diversity of insects in a field, the population may be all 1-metre squares in the field, and the size of the population will be the number of such plots - which will equal the area of the field.
Is it possible to have a standard deviation of less than one?
Anand Mehta said yes and this is correct. You will get a SD, for example, if all of the data points are less than one, or if the data points are very close together and there is not much spread in the data..
this is my assigment problem. can u help me
what percentage of matches in a pair of 100 amino acid long proteins would lead to a significant alignment score?
what is that a significant alignment score. i cant understand it.
can any one help me.
also they tell us to justify it using MATLAB
If you only have twins will the birthday paradox still hold true?
Sounds like a trick question, since twins will almost always be born on the same day.
Well bearing in mind that it may be completely out of context, I was asked the same question earlier by a friend... In his situation, I think someone had tried to call him a bastard, via SMS, with predictive text turned on.
