Statistics
Definition of Statistics

• Statistics is a branch of applied mathematics concerned with collecting, organizing, and interpreting data. The Data are represented by means of graphs.
• Statistics is also the mathematical study of the Likelihood and Probability of events occurring based on known quantitative Data or a collection of data.
• Statistics, thus attempts to infer the properties of a large collection of Data from inspection of a Sample of the collection thereby allowing educated guesses to be made with a Minimum of expense.
• There are basically three kinds of averages commonly used in statistics. They are: mean, median, and mode.

Example on Statistics

• A Survey was conducted to find the favorite fruit of 100 people. The Circle Graph below shows the results of the survey.

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Solved Example on Statistics

What is the Probability of getting two tails and one head, when 3 coins are tossed at a time?
Choices:  
A. 13
B. 14
C. alt="" />
D. 17
Correct Answer: C
Solution:
Step 1: Number of possible outcomes when one coin is tossed = 2.    [Outcomes are Head(H) and Tail(T).]
Step 2: The possible outcomes, when 3 coins are tossed are {TTT, THT, TTH, THH, HHT, HTH, HTT, HHH}.
Step 3: Number of favorable outcomes = 3 [Favorable outcomes are THT, TTH, HTT.]
Step 4: alt="" />  [Substitute.]
Step 5: So, Probability of getting two tails and one head is alt="" />.

Related terms for Statistics

• Data
• Graph
• Mean
• Median
• Mode
• Standard Deviation
• Range
• Probability
• Sample
• Population

Additional Links for Statistics

• Click here for samples
• Back to Mathematics Dictionary