The Chi-Square Test Is an Approximate Test

question 48

Multiple Choice

The chi-square test is an approximate test.The approximation is relatively good if the

• A)expected number of cases in each category is 10 or more.
• B)expected number of cases in each category is 5 or more.
• C)expected number of cases in each category is 3 or more.
• D)actual number of cases in each category is 10 or more.
• E)actual number of cases in each category is 5 or more.

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Definitions:

Dextrorotatory

Describes a substance that rotates the plane of polarized light to the right, or clockwise, as seen by an observer towards the light source.

Levorotatory

Describing a substance that rotates the plane of polarized light to the left or counterclockwise.

Racemic Mixture

A mixture containing equal amounts of left- and right-handed enantiomers of a chiral molecule, making it optically inactive.

Enantiomer

One of a pair of molecules that are mirror images of each other and cannot be superimposed, often possessing different biological activities.