Which of the Following Statements Is INCORRECT

question 34

Multiple Choice

Which of the following statements is INCORRECT?

• A) Diagnostic imaging of the human digestive tract often requires a patient to consume a slurry of BaSO₄(s),a compound that contains the toxic Ba²⁺ ion.
• B) Hydroxyapatite is a calcium containing compound that is the main component of tooth enamel.
• C) Beryllium is toxic.Exposure (by breathing)to beryllium can cause berylliosis.
• D) Most magnesium is obtained from seawater,where it is present at a roughly 0.05 M concentration.
• E) Calcium is the central element in chlorophyll.

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Definitions:

Normal Distribution

A bell-shaped distribution curve which is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean.

Variance

A measure of the dispersion indicating how far individual numbers are from the mean.

Chi-squared Distribution

A statistical tool used to compare observed data with data we would expect to obtain according to a specific hypothesis.

Sample

A subset of individuals or units from a larger population used to estimate characteristics of the whole population.