686 4 Sample # Number of viable Number of cells in all four 1Xımm Xi-X ** (Xi-X)2 cells ml* per (see formula below) 9.6E+05 830000 squares 384 1 1.42E+05 2.02E+10 332 341 335 852500 3 837500 210000...

I’m very confused on how I’m supposed to calculate the two blank columns. The formula has me a bit confused. What exactly am I supposed to subtract? Is “Xi”the number of cells per ml? If so what is “X” represent.

Extracted text: 686 4 Sample # Number of viable Number of cells in all four 1Xımm Xi-X ** (Xi-X)2 cells ml* per (see formula below) 9.6E+05 830000 squares 384 1 1.42E+05 2.02E+10 332 341 335 852500 3 837500 210000 D02500 కం 324 321 291 627500 787500 80000 852500 935000 81500 737500 827500 755000 X (average # cells/ml) 251 6. 315 320 341 374 326 10 11 12 13 14 15 16 295 331 302 Variance (s2)** Standard deviation 76400 (s)**


Extracted text: Formulas Calculating number of cells/ml *(times 10 to get # cells per ul; times 10° to get # cells per ml) * Cells per ml = number of cells counted in 4 squares X 104* 4 **See below for calculation of the variance and standard deviation The mean X = E Xi (E Xi = sum of the individual values; n = number of samples) n *n-1 is the statistical convention when dealing The variance (s²) = E (Xi-X)² (n-1)* with samples from a single population. https://explorable.com/statistical-variance S =Vs2 is the standard deviation