[ 317 ] Life Science GED ® TEST SCIENCE FLASH REVIEW • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • In an experiment, Jan records the heights in centimeters of five plants: 10.1, 9.8, 10.0, 10.1, 9.9 Next, find the variance and standard deviation of the plant heights. The height values and mean have already been plugged into the table. Fill in the remaining cells in the table with the appropriate values. You may use a calculator. Values – Mean = x 2 = 10.1 – 9.98 0.12 ____ × ____ ____ 9.8 – 9.98 –0.18 ____ × ____ ____ 10.0 – 9.98 0.02 ____ × ____ ____ 10.1 – 9.98 0.12 ____ × ____ ____ 9.9 – 9.98 –0.08 ____ × ____ ____ Total: ____ In an experiment, Jan records the heights in centimeters of five plants: 10.1, 9.8, 10.0, 10.1, 9.9 Now, complete the equation to find the variance using the sum you arrived at in the table in the previous flash card. Remember, n is the number of items in the sample. The total from the table goes here 2 _______________________________________ = σ X n – 1 σ X 2 = ?