1) Calculate the variance and the standard deviation for the following sample data.
Scores: 10, 7, 9, 1, 2, 0, 6
Scores: 10, 7, 9, 1, 2, 0, 6
2) For each of the following samples:
Sample #1: 1, 0, 3, 6
Sample #2: 1, 3, 5, 4, 7
Sample #2: 1, 3, 5, 4, 7
a. Compute the mean.
b. Determine whether it would be better to use the computational or the definitional formula for SS.
c. Compute the SS.
3) For the following sample, use the computational formula to calculate SS. Then, compute the sample variance and standard deviation. Scores: 1, 3, 1, 1
4) Using the definitional formula, compute SS, variance and the standard deviation for the following sample of scores. Scores: 3, 6, 1, 6, 5, 3
5) Without some correction, sample variability is said to be "biased." Define the term biased, and explain how this bias is corrected in the formula for sample variance.
