Standard Deviation - Data.py

datas = []
ind = raw_input("Enter the number data to be evaluated: ")
print ("\n")
strength = int(ind)
for i in range (0, strength):
	inp = raw_input("Enter data " + str(i+1) + ": ")
	z = int(inp)
	datas.append(z)

def print_data(datas):
    for data in datas:
        print data

def data_sum(datas):
    total = 0
    for data in datas: 
        total += data
    return total
    
def data_average(data):
    sum_of_data = data_sum(datas)
    average = sum_of_data / float(len(datas))
    return average

def data_variance(scores):
    average = data_average(scores)
    variance = 0
    for score in scores:
        variance+=(average-score)**2
    c = variance/float(len(scores))
    return c

def data_std_deviation(variance):
    return variance ** 0.5

print ("\n")
print ("\nSum of Data: "), data_sum(datas)
print ("\nAverage Score: "), data_average(datas)
print ("\nVariance: "), data_variance(datas)
print ("\nStandard Deviation: "), data_std_deviation(data_variance(datas))
x = raw_input("\n\nPress any key to exit.")