Results for x data
These results are available in every statistics mode. To show one, press RCL and its teal key; to use it in a formula, press ALPHA and the key. x bar is the mean of x, above the 4 key. s x is the sample standard deviation, above 5, and sigma x the population standard deviation, above 6. n, above 0, is the number of samples. Sum of x, above the decimal point key, is the sum of all values, and sum of x squared, above plus minus, is the sum of their squares.