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All Blog Posts Tagged 'ratio' (2)

Calculation cases of Link Relative Ratio and Year-on-year Comparison in data analytics

Cross-row and group computation often involves computing link relative ratio and year-on-year comparison. Link relative ratio refers to comparison between the current data and data of the previous period. Generally, it takes month as the time interval. For example, compare the sales amount of April with that of March, and the growth rate we get is the link relative ratio of April. Hour, day, week and quarter can also be used as the time…

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Added by Jessica May on September 22, 2014 at 2:00am — No Comments

Double Sampling and Calibrating a visitor usage meter

Ive been consulting with a National Park on how to improve estimates of visitor usage. they have door mounted meters but these are not considered very accurate. Here is a summary of my sample design:





SUMMARY: National Park Administrators are required to file monthly reports of visitor totals at various park facilities such as visitor centers. Although door mounted meters can and are used to estimate these totals, there are issues with the quality of meter counts. Meters are… Continue

Added by J. Liddle on March 26, 2008 at 5:11am — No Comments

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