Calculate the Mean and Standard Deviation for the Results Below

question 21

Multiple Choice

Calculate the mean and standard deviation for the results below for the concentration of lead in a soil sample. 23.2 ppm,20.1 ppm,24.7 ppm,19.9 ppm,21.8 ppm

• A)21.9  3.4 (n = 5)ppm
• B)21.9  2.0 (n =5)ppm
• C)27.4  2.0 (n = 5)ppm
• D)22.0  1.8 (n = 5)ppm
• E)27.4  4.2 (n = 5)ppm

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Definitions:

Major Organic

Pertains to the primary or most significant organic compound or entity in a particular context or reaction.

Major Organic

Typically refers to the major organic product or compound that is predominantly formed in a chemical reaction.

Stereochemical

Pertaining to the spatial arrangement of atoms in molecules and the effect of this arrangement on the chemical and physical properties of those molecules.

Regio-

A prefix in chemistry referring to the region or position in a molecule where a reaction takes place, often used in terms like "regioselective" or "regiospecific".