nag_anderson_darling_normal_prob (g08ckc) calculates the Anderson–Darling goodness-of-fit test statistic and its probability for the case of a fully-unspecified Normal distribution.
Calculates the Anderson–Darling test statistic (see nag_anderson_darling_stat (g08chc)) and its upper tail probability for the small sample correction:
for observations.
4 References
Anderson T W and Darling D A (1952) Asymptotic theory of certain ‘goodness-of-fit’ criteria based on stochastic processes Annals of Mathematical Statistics23 193–212
Stephens M A and D'Agostino R B (1986) Goodness-of-Fit Techniques Marcel Dekker, New York
5 Arguments
1:
n – IntegerInput
On entry: , the number of observations.
Constraint:
.
2:
issort – Nag_BooleanInput
On entry: set if the observations are sorted in ascending order; otherwise the function will sort the observations.
Constraint:
if , the values must be sorted in ascending order.
4:
ybar – double *Output
On exit: the maximum likelihood estimate of mean.
5:
yvar – double *Output
On exit: the maximum likelihood estimate of variance.
6:
a2 – double *Output
On exit: , the Anderson–Darling test statistic.
7:
aa2 – double *Output
On exit: the adjusted .
8:
p – double *Output
On exit: , the upper tail probability for the adjusted .
9:
fail – NagError *Input/Output
The NAG error argument (see Section 3.6 in the Essential Introduction).
6 Error Indicators and Warnings
NE_ALLOC_FAIL
Dynamic memory allocation failed.
NE_BAD_PARAM
On entry, argument had an illegal value.
NE_INT
On entry, .
Constraint: .
NE_INTERNAL_ERROR
An internal error has occurred in this function. Check the function call and any array sizes. If the call is correct then please contact NAG for assistance.
NE_NOT_INCREASING
and the data in y is not sorted in ascending order.
7 Accuracy
Probabilities are calculated using piecewise polynomial approximations to values estimated by simulation.
8 Parallelism and Performance
Not applicable.
9 Further Comments
None.
10 Example
This example calculates the statistics for data assumed to arise from a fully-unspecified Normal distribution and the -value.