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#                                                          #
#       Virtual Laboratory of Geomathematics in Python     #
#                                                          #
#            Enumerative Data Models (18.08.2017)          #
#                                                          #                
#    VLG Team, Complutense University of Madrid, Spain     #
#                                                          #
#   THIS SCRIPT IS PROVIDED BY THE AUTHORS "AS IS" AND     #
#   CAN BE USED BY ANYONE FOR THE PURPOSES OF EDUCATION    #
#   AND RESEARCH.                                          #
#                                                          #
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from statsmodels.stats.proportion import proportions_ztest
# Example. Granulometric analysis of soil, Is the soil suitable for agriculture?
# ONE PROPORTION
x = 15
n = 42
H0 = 0.45
# alternative : string in [‘two-sided’, ‘smaller’, ‘larger’]
HA = 'smaller'
z,p = proportions_ztest(x, n, H0, HA)
print()
print(' z-stat. one proportion = {z} \n p-value = {p}'.format(z=z,p=p))
print()