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katrin [286]
3 years ago
11

A study of the relationship between age and various visual functions (such as acuity and depth perception) reported the followin

g observations on the area of scleral lamina (mm2) from human optic nerve heads: 2.79 2.53 2.78 3.79 2.33 2.72 3.88 4.15 3.79 4.43 3.47 4.47 2.50 3.61 2.77 3.53 3.07 (a) Calculate Σxi and Σxi2. (Round Σxi2 to two decimal places.) Σxi = mm2 Σxi2 = mm4
Mathematics
1 answer:
Mila [183]3 years ago
8 0

Answer:

Σxi =56.61

Σxi²=196.23

Step-by-step explanation:

X be the random variable represents area of scleral lamina (mm2) from human optic nerve heads

Σxi can be obtain by adding all x values

Σxi=2.79+2.53+2.78+3.79+2.33+2.72+3.88+4.15+3.79+4.43+3.47+4.47+2.5+3.61+2.77+3.53+3.07=56.61

Σxi =56.61

Σxi² can be obtained by squaring x values and then adding them.

Σxi²=2.79²+2.53²+2.78²+3.79²+2.33²+2.72²+3.88²+4.15²+3.79²+4.43²+3.47²+4.47²+2.5²+3.61²+2.77²+3.53²+3.07²=196.233

Σxi²=196.23

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