Which of the Following Is True of Probability Sample Sizes

question 19

Multiple Choice

Which of the following is true of probability sample sizes?

• A) The more precise the required sample results, the larger the sample size.
• B) The smaller the desired error, the smaller the sample size.
• C) The shorter the variability in the data being estimated, the larger the sample size needed.
• D) The higher the level of confidence desired, the smaller the sample size needed.
• E) The population standard deviation is a measure of the dispersion of the population, and its square root is referred to as the population variance.

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Definitions:

EOG

Electrooculography, a technique for measuring the corneo-retinal standing potential that exists between the front and the back of the human eye.

Snellen Eye Chart

A chart used to measure visual acuity, consisting of rows of letters decreasing in size, which is read from a standard distance.

Ophthalmoscope

A medical device used by doctors to examine the inside of the eye, including the retina and the optic nerve.

Astigmatism Test Chart

A visual tool used in eye examinations to detect astigmatism by measuring how light is perceived by the eye from different angles.