A = [9,7,4,6,3]
B = [2,3,3,8,4]

import scipy.stats as st
def avg(lst):
    return float(sum(lst)) / len(lst)
print("A:", avg(A))
print("B:", avg(B))
print("Speedup: %.2f" % ((avg(A) / avg(B))))

stddev = st.nanstd
print("A: %.2f" % stddev(A))
print("B: %.2f" % stddev(B))
print(avg(A)-stddev(A), "<", avg(B)+stddev(B), "    (overlap!)")

pval = st.ttest_ind(A,B)[1]
print("p-value: %.0f%%" % (pval*100))

pval = st.ttest_ind(A*3,B*3)[1]
print("p-value: %.2f%%" % (pval*100))