Statistics

Run a chi-square test of independence on a contingency table and see whether the difference is significant

Work out nCr and nPr for choosing r items from n, with and without repetition

Work out the confidence interval for a population mean from a sample

Work out the Pearson correlation coefficient between two lists of numbers, and how much of the variance it explains

Fit a straight line through paired x and y values, with the slope, intercept and fit

Work out the central tendency, range and quartiles of a list of numbers

Find z scores and the probability of landing below, above or between two values on a normal curve

Convert betting odds between decimal, fractional and American formats, with the implied probability

Work out the complement of two events and their combined and/or probability

Work out how many responses a survey needs for a given margin of error and confidence level

Work out the variance and standard deviation of a list of numbers, as a sample or a population

Work out how many standard deviations a value sits from the mean, and its percentile