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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Siddhi Sisodia posted an Question
July 08, 2021 • 19:35 pm
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30 points
30 points
- UGC NET
- Commerce
What is modal distribution?
what is modal distribution? and relationshp between mean median mode of slightly positively skewed distribution
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Ronak kumari upadhyay![best-answer]()
modal distribution method statistically quantifies overall differences between measured time-histories. In this method, power spectra of measured structural response are interpreted as collections of independent modal responses. Each modal response is isolated, re-scaled, and interpreted as a statistical distribution. Data-sets (windows in a measured time-history) are then compared using standard statistical methods, resulting in a quantitative significance level of the differences between power spectra. An example is presented to validate the new method and to quantify how long a time-history is required for the new method to meet confidence level requirements. The modal distribution method is found to be very effective at detecting subtle changes of mean modal frequencies, which may be used to infer changes in structural condition.