Given the following set of data, determine the approximate standard deviation. 1, 2, 3, 4, 5, 4, 3, 2, 1, 0, 1

A developmental psychologist is interested in studying how long babies gaze at a photograph of a human face. To test this question, she shows a picture to a sample of six babies and records the length of their gaze in seconds. The data are as follows: 12, 17, 18, 20, 20, 29. Calculate the mean, median, mode, range, variance and standard deviation for the sample.

What is the variance and standard deviation of the following data: 8, 12, 18, 40, 42, 45, 50, 51, 60, 69, 70

Calculate the mean, median and sample standard deviation for the following data.      1, 5, 2, 6, 8