0
Briefly, the variance for a variable is a measure of the dispersion or spread of scores. Covariance indicates how two variables vary together.
The variance-covariance matrix is a compact way to present data for your variables. The variance is presented on the diagonal (where the column and row intersect for the same variable), while the covariances reside above or below the diagonal.
Wiki User
∙ 15y ago
A variance-covariance matrix is a square matrix that contains the variances of variables on the diagonal and the covariances between each pair of variables off-diagonal. It is used to describe the relationships and variability between multiple variables in a dataset.
Add your answer:
Earn +20 pts
What is the purpose of calculating the mean and the variance?
Calculating the mean helps to understand the central tendency of a data set, while calculating the variance provides information about the spread or dispersion of the data points around the mean. Together, the mean and variance provide a summary of the data distribution, enabling comparisons and making statistical inferences.
Which term is a synonym for diversity?
Variance, range, assortment, variety, medley, distinction... multiculturism
Which sociologist coined the term matrix of domination?
The term "matrix of domination" was coined by sociologist Patricia Hill Collins in her book "Black Feminist Thought." It refers to the interlocking systems of oppression such as race, gender, and class that shape and constrain individuals' experiences and identities.
What are the three conditions necessary for causation between variables?
The three conditions necessary for causation between variables are covariance (relationship between variables), temporal precedence (the cause must precede the effect in time), and elimination of plausible alternative explanations (other possible causes are ruled out).
What is the synonyms of diversity?
assortment, dissimilarity, distinction, distinctiveness, divergence, diverseness, diversification, heterogeneity, medley, mixed bag*, multeity, multifariousness, multiformity, multiplicity, range, unlikeness, variance, variegation, variousness
How do you calculate a variance covariance matrix explain with an example?
variance - covariance - how to calculate and its uses
How 2 calculate a variance covariance matrix?
look in a maths dictionary
What is the meaning of analysis of covariance?
A mix of linear regression and analysis of variance. analysis of covariance is responsible for intergroup variance when analysis of variance is performed.
How do you calculate a variance-covariance matrix explain with an example?
Here's a link to a website that has an example http://www.itl.nist.gov/div898/handbook/pmc/section5/pmc541.htm and another example for understanding covariance and variance http://www.visualstatistics.net/Visual%20Statistics%20Multimedia/covariance.htm
Distinguish between analysis of variance and analysis of covariance?
) Distinguish clearly between analysis of variance and analysis of covariance.
What is difference between covariance and variance?
Covariance: An Overview. Variance refers to the spread of a data set around its mean value, while a covariance refers to the measure of the directional relationship between two random variables.
Where can one find information on the covariance matrix?
One can find information on the covariance matrix on the Wikipedia website where there is much information about the mathematics involved. One can also find information on Mathworks.
What is significance of diagonal terms of variance-covariance matrix?
The diagonal terms give the variances. The square root of which gives the standard deviations. The diagonal terms give the variances. The square root of which gives the standard deviations.
What has the author Tony Lancaster written?
Tony Lancaster has written: 'The covariance matrix of the information matrix test'
How do you Calculate Stock Beta in Excel?
You need to use the variance and covariance functions in Excel 1. Calculate the covariance of the stock returns with respect to an index 2. Calculate the variance of the index 3. Divide the first number by the second. See the related link for a spreadsheet
What do the eigen vectors of the covariance matrix give us?
deneme deneme deneme yi verir
How 2 calculate a variance-covariance matrix?
See related link. You can use Excel, if you dataset is not too big. Generally, if I have a table of data, with n columns corresponding to n variables with N observations, I can calculate the covariance of columns a and b, using excel covar function, covar(range of first data values, range of second data values) To keep things organized, you may want to name the ranges of your columns and use them as the arguments in the covar.
