def cochran(sd, data, rnge):
z = Zscore.zscore(sd, data)
p = PopulationProportion.proportion(sd, data, rnge)
e = MarginError.marginError(sd, data)
q = 1 - p
cochran = (Exponentiation.power(z, 2) * p * q) / Exponentiation.power(
e, 2)
return cochran
def sampleSize(sd, data):
e = MarginError.marginError(sd, data)
stdDev = StandardDeviation.standardDeviation(data)
val = (1.96 * stdDev) / e
sample = Exponentiation.power(val, 2)
return sample
def sampleSize(sd, data, percentage):
z = Zscore.zscore(sd, data)
e = MarginError.marginError(sd, data)
p = percentage
q = 1 - p
val = z / e
sample = Exponentiation.power(val, 2) * p * q
return sample
def test_MathOperations_exponentiation(self):
self.assertEqual(8, Exponentiation.power(2, 3))
def test_MathOperations_exponentiation(self):
Exponentiation.power(2, 2)
self.assertEqual(4, Exponentiation.power(2, 2))
def Power(a, b):
return Exponentiation.power(a, b)
def Power(self, a, b):
self.Result = Exponentiation.power(a, b)
return math.pow(a, b)
def test_MathOperations_Exponentiation(self):
self.assertEqual(16, Exponentiation.power(4, 2))
def Power(self, a, b):
self.Result = Exponentiation.power(a, b)