Introduction of Statistics
Statistics is the study of the analysis, collection, organization, interpretation and presentation of data. It deals with all aspects of this which involves the planning of data collection in terms of the design of surveys and experiments.
A statistician is someone who is principally well versed in the ways of thinking essentially for the successful application of statistical analysis. These people have regularly gained this experience through working in any of a broad number of fields. There is one more discipline known as mathematical statistics which studies statistics mathematically.
The term statistics whenever referring to the scientific discipline is specifically as in "Statistics is an art". This must not be confused with the word statistic, that is referring to a quantity (such as mean or median) computed from a set of data. Whose plural is statistics ("this statistic appears wrong" or "these statistics are ambiguous").
Key terms used in statistics:
Null hypothesis:
Interpretation of the statistical information can frequently include the development of a null hypothesis in that the postulation is that whatever is proposed as a cause has no effect on the variable being measured.
The best illustration for a novice is the predicament encountered by a jury trial. The null hypothesis that is represented by H0, asserts that the defendant is innocent, whereas the alternative hypothesis H1, asserts that the defendant is responsible. The indictment comes due to suspicion of the guilt. The H0 positions in opposition to H1 and is maintained unless H1 is supported by proof "beyond a reasonable doubt". Although, "the failure to reject H0" in this situation does not imply innocence, but only that the proof was insufficient to convict. Therefore the jury does not accept essentially H0 but fails to reject H0. While one cannot confirm a null hypothesis HO one can test how close it is to being true with a power test, which is the tests for type II of errors.
Error:
Working from a null hypothesis, the two primary forms of error is recognized:
Type I: errors where the null hypothesis is incorrectly rejected giving a "false positive".
Type II: the errors where null hypothesis fails to be rejected and a real difference between populations is missed giving a "false negative".
The error also refers to the extent to which separate observations in a sample vary from a central value, such as the population mean or sample. Most of the statistical methods seek to minimize the mean-squared error, and these are known as "methods of least squares."
The measurement processes, which generate statistical data, are also subject to error. Most of these errors can be categorized as random (noise) or systematic (bias), but other significant kinds of errors (example, blunder, like when an analyst reports wrong units) can also be significant.
Symbols used in statistics
Relational Symbols
=
equals is the same as
≠
is not equal to is different from
>
is greater than is more than exceeds is above
≥ or >=
is greater than or equal to is at least is not less than
<
is less than is fewer than is below
≤ or <=
is less than or equal to is at most does not exceed is not greater than is no more than
A < x < B
x is between A and B, exclusive
A ≤ x ≤ B
x is between A and B, inclusive
A ≅ B
A is approximately equal to B
Here are symbols for various sample statistics and the corresponding population parameters. They are not repeated in the list below.
sample statistic
population parameter
description
x¯ "x-bar"
μ "mu" or μx
mean
M (TIs say Med)
(none)
median
s (TIs say Sx)
σ "sigma" or σx
Standard deviation For variance, apply a squared symbol (s² or σ²).
r
ρ "rho"
coefficient of linear correlation
p^ "p-hat"
p
proportion
zo to χ²o
(n/a)
calculated test statistic
Email based Statistics Homework Help -Assignment Help
Tutors at the www.tutorsglobe.com are committed to provide the best quality Statistics homework help - assignment help. They use their experience, as they have solved thousands of the Statistics assignments, which may help you to solve your complex Statistics homework. You can find solutions for all the topics come under the Statistics. The dedicated tutors provide eminence work on your Math homework help and devoted to provide K-12 level math to college level math help before the deadline mentioned by the student. Statistics homework help is available here for the students of school, college and university. Tutors Globe assure for the best quality compliance to your homework. Compromise with quality is not in our dictionary. If we feel that we are not able to provide the homework help as per the deadline or given instruction by the student, we refund the money of the student without any delay.
Qualified and Experienced Statistics Tutors at www.tutorsglobe.com
Tutors at the www.tutorsglobe.com take pledge to provide full satisfaction and assurance in Statistics homework help. Students are getting math homework help services across the globe with 100% satisfaction. We value all our service-users. We provide email based Statistics homework help - assignment help. You can join us to ask queries 24x7 with live, experienced and qualified math tutors specialized in statistics.
the company whose shares have been attained do not become a subsidiary of the investing company. One technique would just include the investment of shares in the company at cost in the investing statement of financial position of company.
tutorsglobe.com hypersensitivity-anaphylaxsis assignment help-homework help by online classification of hypersensitivity reactions tutors
www.tutorsglobe.com offers business economics homework help, business economics assignment help, online business economics homework tutoring assistance, and writing assignments in business economics.
tutorsglobe.com hydrogen-source of power assignment help-homework help by online energy crisis tutors
tutorsglobe.com treatment of diseases assignment help-homework help by online vibrio tutors
tutorsglobe.com etching glass assignment help-homework help by online halogen family tutors
www.tutorsglobe.com offers Control Constructs homework help, assignment help, case study, writing homework help, online tutoring assistance by computer science tutors.
Lower Invertebrates tutorial all along with the key concepts of traits of Invertebrates, Categories of invertebrates, Arthropods, Sponges, Cnidarians, Segmented worms, Flatworms, Roundworms, Mollusks and Echinoderms
Theory and lecture notes of Steps to Hypothesis Testing all along with the key concepts of Steps to hypothesis testing, homework help, assignment help and hypothesis testing tutors. Tutorsglobe offers homework help, assignment help and tutor’s assistance on Steps to Hypothesis Testing.
Nuclear Physics tutorial all along with the key concepts of Nuclear fusion, Nuclear fission, Radioactivity, Radioactive Decay, Types of Decay, Beta decay, Alpha decay, Gamma decay, Uses of radioactivity, Nuclear physics in medicine, Harnessing nucleus for power
Online CLEP Exam Preparation course and online CLEP tutoring package offered by www.tutorsglobe.com are the most comprehensive and customized collection of study resources on the web, offering best collection of CLEP Practice papers, quizzes, CLEP test papers, and guidance.
a memory card (occasionally known as a flash memory card or a storage card) is a small storage medium employed to store data like pictures, text, audio and video, for use on small, portable devises.
nuclear reactor tutorial all along with the key concepts of classification of nuclear reactors, components of nuclear reactors,boiling-water reactor,pressurized-water reactor, fast breeder reactor
It is fairly common for one company to be capable to exercise control over the activities of another.
almost all businesses that include more than a few owners and/or employees are set up as limited companies.
1963707
Questions Asked
3689
Tutors
1449671
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!