**Single sample tests: get to the heart of your data**

**QED Statistics has all the methods you need to examine the basics of your data set:**

**Mean**- to calculate the arithmetic mean of a list of numbers.**Median**- to calculate the median of a list of numbers.**Variance**- to calculate the variance of a list of numbers.**Standard deviation**- to calculate the standard deviation of a list of numbers.**Skewness**- to calculate the skew of a list of numbers.**Kurtosis**- to calculate the kurtosis (degree of peak) of a list of numbers.**Probability Plot**- to examine the cumulative frequency distribution and investigate normality.**Box and Whisker**- To create a box and whisker plot for a variable.**Testing Normality**- Use Chi, Shapiro-Wilk or Lilliefors tests to test if the variable is normally distributed.**t-Test**- to test the mean of the variable for significant difference from a defined value.**z Test**- to test the mean of the variable for significant difference from a defined value.**Summary of Data**- the data set statistics.

**Don't forget, for most calculations, Expand & Explore willshow you exactly how the calculation is performed.
Meanwhile, the infinitely customisable charts will emphasisethe importance of your results!
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