A Solution Contains 15 Ppm of Benzene

question 21

Multiple Choice

A solution contains 15 ppm of benzene. The density of the solution is 1.00 g/mL. This means that ________.

• A)there are 15 mg of benzene in 1.0 g of this solution
• B)100 g of the solution contains 15 g of benzene
• C)1.0 g of the solution contains 15 × 10^-6 g of benzene
• D)1.0 L of the solution contains 15 g of benzene
• E)the solution is 15% by mass of benzene

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Definitions:

Two-Tail

In statistics, a two-tail test is a method in which the critical area of a distribution is two-sided and tests whether a sample is greater than or less than a certain range of values.

Independent Samples T-Test

A statistical test used to determine if there is a significant difference between the means of two independent samples.

Sum of Squares for Error

The sum of the squared differences between the observed values and the predicted values in a dataset, used in statistical analysis.

Randomized Block Design

An experimental design in which subjects are first divided into blocks based on a certain characteristic, and then randomly assigned to different treatment groups within each block.