Nuisance parameter : A nuisance parameter is a term used in statistical modeling to refer to a variable that is not of primary interest in a particular analysis, but is included in the model for the purpose of controlling for its effect on the outcome of interest. In other words, a nuisance parameter is a […]

nQuery advisor : nQuery Advisor is a statistical software package that is used to design and analyze experiments, particularly those involving complex sample designs and multiple factors. It is particularly useful in fields such as engineering, manufacturing, and the life sciences, where it is often necessary to optimize processes or products through experimentation. Here are […]

NORMIX : NORMIX is a computer program that is used for statistical analysis in the field of biomedical research. It is a software package that provides a range of tools for analyzing data from clinical trials and other types of biomedical studies. One of the main features of NORMIX is its ability to perform statistical […]

Normal scores : Normal scores, also known as standard scores or z-scores, are a way of measuring how far a particular score falls from the mean of a dataset. They are calculated by subtracting the mean from the score and dividing the result by the standard deviation. This allows for scores to be compared and […]

Normality : Normality is a statistical concept that refers to the degree to which a set of data conforms to a normal distribution, which is a symmetrical, bell-shaped curve. A normal distribution is characterized by the fact that the majority of the data points are concentrated around the mean, with fewer and fewer data points […]

Normal Distribution : Normal distribution, also known as the bell curve, is a type of statistical distribution that is symmetrical around the mean, with the majority of the data falling within a few standard deviations of the mean. It is a continuous distribution, which means that it is possible for any value within the range […]

Normal approximation : Normal approximation is a statistical method that allows us to approximate complex probability distributions using the normal (bell curve) distribution. This can be useful in situations where we want to make predictions or calculations about a population, but the exact distribution of the data is unknown or too complex to work with […]

Non-response : Non-response refers to the inability or unwillingness of individuals to participate in a research study or survey. It can occur for a variety of reasons and can significantly impact the accuracy and validity of the research findings. Here are two examples of non-response: Non-response due to refusal: Some individuals may simply refuse to […]

Non-randomized clinical trial : A non-randomized clinical trial is a type of research study that is conducted to evaluate the effectiveness and safety of a medical treatment or intervention. Unlike a randomized clinical trial, which randomly assigns participants to receive either the treatment being tested or a placebo, a non-randomized trial does not involve random […]

Non-orthogonal designs : Non-orthogonal designs, also known as non-orthogonal contrasts, are a type of statistical design used in experiments to compare the effects of multiple variables on a dependent variable. Unlike orthogonal designs, which have independent variables that are completely uncorrelated and do not overlap, non-orthogonal designs have variables that are partially correlated and may […]