Lines Matching refs:xbar
822 def variance(data, xbar=None):
826 values. The optional argument xbar, if given, should be the mean of
839 the optional second argument ``xbar`` to avoid recalculating it:
845 This function does not check that ``xbar`` is actually the mean of
846 ``data``. Giving arbitrary values for ``xbar`` may lead to invalid or
860 T, ss, c, n = _ss(data, xbar)
907 def stdev(data, xbar=None):
916 T, ss, c, n = _ss(data, xbar)
945 T, ss, xbar, n = _ss(data)
950 return float(xbar), _float_sqrt_of_frac(mss.numerator, mss.denominator)
953 return float(xbar), float(xbar) / float(ss)
985 xbar = fsum(x) / n
987 sxy = fsum((xi - xbar) * (yi - ybar) for xi, yi in zip(x, y))
1013 xbar = fsum(x) / n
1015 sxy = fsum((xi - xbar) * (yi - ybar) for xi, yi in zip(x, y))
1016 sxx = fsum((d := xi - xbar) * d for xi in x)
1074 xbar = fsum(x) / n
1076 sxy = fsum((xi - xbar) * (yi - ybar) for xi, yi in zip(x, y))
1077 sxx = fsum((d := xi - xbar) * d for xi in x)
1082 intercept = 0.0 if proportional else ybar - slope * xbar