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During an eye examination, the nurse requests that the client read letters located on the Snellen E chart. The client's vision is determined to be 20/200. Which statements regarding this client's vision are accurate?
Normal Model
A statistical model that describes data that clusters around a mean in a symmetrical, bell-shaped distribution.
Mean
The average value calculated by adding all numbers in a dataset and dividing by the count of numbers.
Standard Deviation
It quantifies the diversity or spread among a set of numerical values, showing how much they deviate from the average value.
Interquartile Range
The difference between the 75th and 25th percentiles of a data set, measuring the spread of the middle 50% of values.
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