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The most common measure of location is the circular mean. The population circular mean is simply the first moment of the distribution while the sample mean is the first moment of the sample. The sample mean will serve as an unbiased estimator of the population mean.
After importing geospatial data into PDF, one can use the data in a variety of ways: [1] Find and mark location coordinates. Measure distance, perimeter, and area. Change the coordinate system and measurement units. Copy location coordinates to the clipboard, and then use them to show locations in several web mapping services.
A location test is a statistical hypothesis test that compares the location parameter of a statistical population to a given constant, or that compares the location parameters of two statistical populations to each other.
Mean center: The mean is an important measure of central tendency, which when extended to a set of points, located on a Cartesian coordinate system, the average location, centroid or mean center, can be determined. The weighted mean center is analogous to frequencies in the calculation of grouped statistics, such as the weighted mean.
Measures of spatial central tendency [ edit ] The coordinate-wise mean of a point set is the centroid , which solves the same variational problem in the plane (or higher-dimensional Euclidean space ) that the familiar average solves on the real line — that is, the centroid has the smallest possible average squared distance to all points in ...
Scientifically precise local time varies with longitude: a difference of 15° longitude corresponds to a one-hour difference in local time, due to the differing position in relation to the Sun. Comparing local time to an absolute measure of time allows longitude to be determined. Depending on the era, the absolute time might be obtained from a ...
μ is a measure of location (the distribution is clustered around μ), and; is a measure of concentration (a reciprocal measure of dispersion, so 1/ is analogous to σ 2). If is zero, the distribution is uniform, and for small , it is close to uniform.
Height above mean sea level is a measure of a location's vertical distance (height, elevation or altitude) in reference to a vertical datum based on a historic mean sea level. In geodesy, it is formalized as orthometric height. The zero level varies in different countries due to different reference points and historic measurement periods.