# What is statistical significance?

this is when there is a 95% chance that a discovery is wrong.Science does not try to prove something is right rather it tries to prove there is a high margin of being wrong.

### What is the difference between statistical significance versus practical significance?

Statistical significance means that you are sure that the statistic is reliable. It is very possible that whatever you conclusion or finding is, it may not be important or it not have any decision-making utility. For example, my diet program has a 1 oz weight loss per month and I can show that is statistically significant. Do you really want a diet like that? It is not practically significant

### How is z score and p value related?

The z-score is a statistical test of significance to help you determine if you should accept or reject the null-hypothesis; whereas the p-value gives you the probability that you were wrong to reject the null-hypothesis. (The null-hypothesis proposes that NO statistical significance exists in a set of observations).

### What has the author David Salsburg written?

David Salsburg has written: 'The use of restricted significance tests in clinical trials' -- subject(s): Clinical trials, Methods, Probability theory, Randomized Controlled Trials, Statistical Models, Statistical methods, Statistics 'The Lady Tasting Tea' -- subject(s): History, Science, Statistical methods 'Statistics for toxicologists' -- subject(s): Experimental Toxicology, Statistical methods, Toxicology

### What is statistical test of hypothesis?

A statistical hypothesis test will usually be performed by inductively comparing results of experiments or observations. The number or amount of comparisons will generally dictate the statistical test to use. The researcher is basically making a statement and assuming that it is either correct (the hypothesis - H1) or assuming that it is incorrect (the null hypothesis - H0) and testing that assumption within a predetermined significance level - the alpha.

### What values are specified by the null hypothesis for the chi square test for goodness or fit?

The value specified is usually the maximum value that the test statistic can take for a given level of statistical significance when the null hypothesis is true. This value will depend on the parameter of the chi-square distribution which is also known as its degrees of freedom. The value specified is usually the maximum value that the test statistic can take for a given level of statistical significance when the null hypothesis is true. This…

### The Binomial Test is a parametric statistical test?

Binomial is a non- parametric test. Since this binomial test of significance does not involve any parameter and therefore is non parametric in nature, the assumption that is made about the distribution in the parametric test is therefore not assumed in the binomial test of significance. In the binomial test of significance, it is assumed that the sample that has been drawn from some population is done by the process of random sampling. The sample…

### What is the relationship between levels of confidence and statistical significance?

The connotation 'statistical significance' takes into account the number of samples as well level of confidence in making a conclusion based on these samples. The level of confidence is typically denoted as 1-alpha (1 minus alpha), where alpha is basically the chance that the reported conclusion will incorrect. The most popular level of confidence is 95%, which coincides with a 5% alpha, meaning that when one makes a conclusion based on a particular sample, there…

### What has the author D J Finney written?

D. J. Finney has written: 'Tables for testing significance in a 2 x 2 contingency table; Supplement. by B. M. Bennett and C. Horst' -- subject(s): Biometry, Probabilities, Tables 'An introduction to statistical science in agriculture' -- subject(s): Agriculture, Statistical methods 'Tables for testing significance in a 2 x 2 contingency table' -- subject(s): Probabilities, Tables 'Probit analysis' -- subject(s): Biomathematics, Estimation theory, Mathematical statistics, Probits

### When Two separate researchers conducted identical experiments but received different results?

The experiment may have been ill-concieved for example there are other variables which have not been taken into account but were present at one location and not at the other. The experiment may lack statistical significance or statistical power and has not been repeated enough times to determine the trun nature of the relationship between variables.

### P -Value in Statistics?

The p value (also sometimes called alpha or probability level) is the percentage chance that the results of a statistical test are due to random error. So a p value of .01, for example, would mean that there is a 1% chance that the results are an error. p is also the cut-off where a test is considered statistically significant. In social sciences, significance is assumed (and therefore the hypothesis supported) when p < .05…

### When does practical significance compensate statistical significance?

Actually, it's the other way around... If something is statistically significant, it may or may not be practically significant. Example: A new pill is proven to reduce the average time someone has the flu from 9 days to 8.85 days. Because it has been proven, it is statistically significant; however, a decrease in .15 days isn't practically significant.

### What has the author Rex B Kline written?

Rex B. Kline has written: 'Principles and practice of structural equation modeling' -- subject(s): Statistical methods, Multivariate analysis, Social sciences, Statistics, Data processing, Mathematical models 'Principles and practice of structural equation modeling' -- subject(s): Statistical methods, Structural equation modeling, Social sciences, Data processing 'Beyond Significance Testing'

### What has the author Johannes Voit written?

Johannes Voit has written: 'The statistical mechanics of financial markets' -- subject(s): Capital market, Finance, Financial engineering, Statistical methods, Statistical physics 'The statistical mechanics of fianancial markets' -- subject(s): Capital market, Finance, Financial engineering, Statistical methods, Statistical physics

### What has the author William D Dupont written?

William D. Dupont has written: 'Statistical modeling for biomedical researchers' -- subject(s): Biometry, Data Interpretation, Statistical, Mathematical Computing, Mathematical models, Medicine, Methods, Models, Statistical, Problems and Exercises, Research, Statistical Data Interpretation, Statistical Models, Statistical methods

### What is the difference between a statistical and a non- statistical question?

a statistical is a question that has a variety of answers, but a non-statistical question has only one answer. like if i say "how old am i?" that is a non-statistical question because there is only one answer. But if I say "How old are the 6th and 7th grade students in school?" that is a statistical question because there will be various answers.

### What is the significance of psychology?

A scientific approach to principles of human behavior. It covers such topics as growth and development, heredity and environment, perception and awareness, feeling and emotion, motivation, learning, thinking and intelligence, individual differences, introduction to statistical concepts, personality and social relations.