Справочник Пользователя для Filemaker Pro 8.5 DE CD Box 5pk TH328D/A
Модели
TH328D/A
28 FileMaker Functions Reference
•
several fields in the first matching record specified by
(table::field1;table::field2;...). You can include fields from different
(table::field1;table::field2;...). You can include fields from different
(table 1::field A;table 2::field B...).
Examples
A portal displays the related values 5, 6, 7, and 8 in Scores.
Variance(table::Scores) returns
Variance(table::Scores) returns
1.66666666...
.
In the following examples:
•
•
Field1 contains two repetitions with values of 1 and 2.
•
Field2 contains four repetitions with values of 5, 6, 7, and 8.
•
Field3 contains four repetitions with values of 6, 0, 4,and 4.
•
Field4 contains one repetition with a value of 3.
Variance(Field4) results in an error since the variance of a single value is not
defined.
Variance(Field1;Field2;Field3) returns
7, 9.33333333...
,
4.5
,
8
if the calculation
is a repeating field.
Student example:
Two classes of students take an exam. Class 1 has scores of 70, 71, 70, 74, 75, 73, 72,
and Class 2 has scores of 55, 80, 75, 40, 65, 50, 95. The variance for each class is:
Class 1:
Student example:
Two classes of students take an exam. Class 1 has scores of 70, 71, 70, 74, 75, 73, 72,
and Class 2 has scores of 55, 80, 75, 40, 65, 50, 95. The variance for each class is:
Class 1:
3.80952380...
Class 2:
361.90476190...
The variance for Class 1 is much lower than the variance for Class 2, because the scores
for Class 2 are more spread out.
for Class 2 are more spread out.
VarianceP
Format
VarianceP(field{;field...})
Parameter
field - any
,
; or an
that returns a field, repeating field, or set of non-repeating fields.
Parameters in curly braces { } are optional.
Parameters in curly braces { } are optional.
Data type returned
number
Variance
x
1
2
x
2
2
… x
n
2
+
+
+
n 1
–
------------------------------------------
x
1
x
2
… x
n
+
+
+
(
)
2
n n 1
–
(
)
-------------------------------------------------
–
=