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.
Problems associated with tropical freshwater tutorial all along with the key concepts of Eutrophication, Sources of eutrophication, Symptoms of Eutrophication, eutrophication on human societies, Control of Eutrophication, Effects of Water Pollution on ecosystems and Water-related diseases
Concept of communities and community interactions tutorial all along with the key concepts of concept of Communities, Coevolution of species within Communities, Types of Communities, Terrestrial Communities, Freshwater Communities, structure of Communities
wwww.tutorsglobe.com offers statistics homework help, statistics assignment help, online tutoring assistance, maths solutions by online qualified tutor’s help.
tutorsglobe.com offers nursing assignment help, nursing homework help, nursing papers, research papers, dissertation and thesis writings services.
Theory and lecture notes of Probability all along with the key concepts of Probability, Sample Spaces, Classical Probability, Empirical Probability, Probability Rules, Probability Experiment and Mutually Exclusive Events. Tutorsglobe offers homework help, assignment help and tutor’s assistance on Probability.
tutorsglobe.com carboxylation reactions assignment help-homework help by online c3 and c4 pathways tutors
Photometry tutorial all along with the key concepts of Photometry and eye, Photometric quantities, Photometric versus radiometric quantities, Photometric measurement methods
Excellent dielectric strength, Very low dissipation factor, Remaining reasonably constant at high frequencies or within humid conditions. No mechanical or chemical stripping needed
Theory and lecture notes of Externalities and Pollution Problem all along with the key concepts of Negative Externalities, Private Marginal Cost, Optimal Environmental Management, Types of Costs, Efficient Management, Coase Theorem. Tutorsglobe offers homework help, assignment help and tutor’s assistance on Externalities and Pollution Problem.
tutorsglobe.com philosophy of the emotions assignment help-homework help by online humanities tutors
tutorsglobe.com karyotyping of human chromosomes assignment help-homework help by online modern genetics tutors
it is supposed that the winding is short pitched through 1 slot. hence, coil span = 11, in terms of slots, or yb = 23 in terms of coil sides.
Oxides and Oxoacids of Halogens tutorial all along with the key concepts of Preparation of Halogen Oxides, Properties of Halogen Oxides, Structure of Oxides of Halogens, Interhalogen Compounds, Properties of Interhalogen compounds and Structure of Interhalogen Compounds
Theory and lecture notes of Normal Distribution all along with the key concepts of Normal Distributions, Standard Normal Distribution, Central Limit Theorem, Sampling Error, Z-score and Correction for Continuity. Tutorsglobe offers homework help, assignment help and tutor’s assistance on Normal Distribution.
theory and lecture notes of theory of ttl logic family all along with the key concepts of totem pole in ttl, ttl transistor switching trouble, solution of ttl switching trouble and assignment help. tutorsglobe offers homework help, assignment help and tutor’s assistance on theory of ttl logic family.
1944855
Questions Asked
3689
Tutors
1459605
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!