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In 1863, English economist William Stanley Jevons proposed taking the geometric average of the price relative of period t and base period 0. [5] When used as an elementary aggregate, the Jevons index is considered a constant elasticity of substitution index since it allows for product substitution between time periods. [6]
The expected value of a random variable is the weighted average of the possible values it might take on, with the weights being the respective probabilities. More generally, the expected value of a function of a random variable is the probability-weighted average of the values the function takes on for each possible value of the random variable.
The mean for the morning class is 80 and the mean of the afternoon class is 90. The unweighted mean of the two means is 85. However, this does not account for the difference in number of students in each class (20 versus 30); hence the value of 85 does not reflect the average student grade (independent of class).
Record Average without reliability range Discouraged: The unweighted average of the source data is recorded "experimental values average at ~1700 [1][2][3]" May be slightly more honest than average with reliability range in that no claim is made about reliability but still requires some knowledge about relative weights of sources.
UPGMA (unweighted pair group method with arithmetic mean) is a simple agglomerative (bottom-up) hierarchical clustering method. It also has a weighted variant, WPGMA , and they are generally attributed to Sokal and Michener .
The average rate for shorter 15-year terms is 6.27% for purchase and 6.30% for refinance, up 16 basis points from 6.11% for purchase and up 17 basis points from 6.13% for refinance this time last ...
A CPI is a statistical estimate constructed using the prices of a sample of representative items whose prices are collected periodically. Sub-indices and sub-sub-indices can be computed for different categories and sub-categories of goods and services, which are combined to produce the overall index with weights reflecting their shares in the total of the consumer expenditures covered by the ...
The basic definition is also known as WAULT to expiry to make the distinction clear. Depending on the market conditions, one might desire a high or low WAULT. For instance, if the rental market is strong and rents are rising, a low WAULT is desirable as that indicates that the current leases are going to expire or renegotiate in the short term ...