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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
What is the chance of pick 4 black cards out of a deck?
1/2*25/51*24/50*23/49
if cards are not replaced
What is the relevance of probability and statistics in the field of information technology?
In the field of IT you are dealing with probabilities all day long. How long will the hardware last, how can you keep the signal for the network strong all over the building, how will adding a new group of computers impact the network, or heaven forbid your network come under attack and you need to keep damage to a minimum while fending off the attack. IT professionals think in probabilities. They're always running scenarios through their heads to come up with and fix problems before they occur.
What is the largest three digit number using numerals 4 and 8?
Using only 8's & 4's and using each atleast once...884. Using all numerals and including 8 once and 4 once...984.
It is acceptable (and quite common) to have multiple values for the mode.
Examine the following data sample:
Number of pets per family on Main Street
1,1,1,1,1,2,2,2,2,2,3,3,3,4,4,5,9
In this case, the mode is {1, 2}
Why would someone want to assume that your sample data represents a population distrubution?
Most people take samples so that they may make estimates of parameters of interest: mean, variance, etc for the whole population. For such an estimate to have any validity the sample data must be assumed to represent a population distribution. Otherwise any conclusions based on the sample are valid only for the sample: hardly worth the effort!
Is sociology more than statistics?
Sociology is the study of human behavior in a social environment and how social interaction relates to development of mental and physical abilities, as well as future success and failure. Statistics are near irrelevant to sociology because it is a very intuitive field of study. So yes, sociology is much more than statistics.
What type of application would you use if the data set is non-numerical?
Non-parametric statistical methods.
What is Australia's Infant mortality rate?
According to the World Health Organisation, the under-five mortality rate per 1000 live births in 2015 for Australia was 3.8
How do you find the maximum and minimum values when the average is known?
You would need more information.
Any set of the form {a,a,a,a,b,b,b,b,c,c} where a<b<c.
What percentage of people today know who Edgar Allen poe is?
It is close to 0%.
Edgar Allan Poe, the writer, died over 150 t=years ago, so any Edgar Allan Poe who is still alive is a namesake but effectively a nonentity. Therefore, the percentage of people who know who he IS is 0%.
What is the probabilitly of rolling a 4 on a 10-sided dice?
The probability is (0.1) times (the number of faces with '4' marked on them).
What is meant by absolute measure?
It is the value without considering the symbols. ie, the negative or positive symbols of the value
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Flip a coin 10 times tails on the 10th?
The result of the tenth toss is usually independent of the previous nine so the probability is 0.5.
Use Binomial theorum to write the full expansion of 2x-5 to 5th power?
The answer is
32x5+-400x4+2000x3+-5000x2+6250x+-3125
