User evaluation data processing method and device and server
A user evaluation and data technology, applied in the field of data processing, can solve the problems of little user reference meaning, different reference value, unreasonable scoring results, etc.
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example 1
[0136] Example 1, Z 0.9955 The Z value of the corresponding Z test statistic can be obtained by the following steps:
[0137] Z 0.9955 The subscript of 0.9955 is 0.9955, use 1-0.9955=0.0045, refer to the Z value table shown in Table 1, it can be seen that by querying the Z value table, the row label of the row where 0.0045 is located is -2.6, and the column label of the column is 0.01, so , get Z 0.9955 The Z value of the corresponding Z test statistic is -2.61.
example 2
[0138] Example 2, if the preset confidence value is 0.99, the significance level a=1-the preset confidence value=0.01, then, Z 1-a / 2 = Z 0.995 . Z 0.995 The Z value of the corresponding Z test statistic can be obtained by the following steps:
[0139] With 1-0.995=0.005, referring to the Z value table shown in Table 1, it can be seen that there is no 0.005 in the Z value table, and the corresponding Z value of -2.58 is 0.0049, and the corresponding Z value of -2.57 is 0.0051, that is to say, The Z value of 0.005 is between -2.58 and -2.57, you can take the average of the two -2.575 as Z 0.995 The Z value of the corresponding Z test statistic.
[0140] Table I
[0141]
[0142] The formula for calculating the T value of the T test statistic is: in: is the average number of test samples; μ 0 is the mean of the population to which the test sample belongs; S is the standard deviation of the test sample; N is the number of test samples.
[0143] In practical applicati...
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