Podcast
Questions and Answers
What is the correct formula for calculating percentage error?
What is the correct formula for calculating percentage error?
- Quantity desired multiplied by maximum potential error divided by 100
- Maximum potential error multiplied by 100 divided by quantity desired (correct)
- Quantity desired divided by maximum potential error multiplied by 100
- Maximum potential error divided by quantity desired multiplied by 100
Why is it necessary for pharmacists to calculate the percentage error?
Why is it necessary for pharmacists to calculate the percentage error?
- To determine the price of a medication
- To verify the expiration date of a drug
- To compare with other competitors
- To ensure the error is within allowable limits (correct)
In order for the formula for percentage error to be valid, what must be true about the error and the quantity desired?
In order for the formula for percentage error to be valid, what must be true about the error and the quantity desired?
- They must be expressed in the same denomination (correct)
- They must be expressed in different denominations
- They must be derived from the same measurement device
- They must both be rounded to the nearest whole number
What is a significant factor that pharmacists must consider when using measuring instruments?
What is a significant factor that pharmacists must consider when using measuring instruments?
Flashcards
Percentage Error in Pharmacy
Percentage Error in Pharmacy
The maximum potential error in a measurement, expressed as a percentage of the desired quantity.
Torsion Prescription Balance
Torsion Prescription Balance
A type of balance used in pharmacies to weigh ingredients, often employing a torsion spring.
Maximum Potential Error
Maximum Potential Error
The maximum amount that a measuring device can deviate from the true value. For instance, a scale with a ±4 mg error could be off by up to 4 mg more or less than the actual weight.
Quantity Desired
Quantity Desired
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Calculating Percentage Error
Calculating Percentage Error
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Study Notes
Percentage Error in Pharmacy
- Accurate measurements are crucial in pharmacy.
- Pharmacists need to understand instrument limitations.
- Torsion prescription balances require percentage error calculation.
- Percentage error = (Maximum potential error * 100) / Desired quantity.
- Error and desired quantity must use the same units.
- For a ±4 mg error in a 100 mg measurement, the percentage error is calculated as follows : (4 mg * 100) / 100 mg = 4%
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Description
This quiz focuses on the concept of percentage error, which is essential for accurate measurements in pharmacy. Understand how to calculate percentage error using examples such as torsion prescription balances and pharmacological measurements. Master the relationship between error, desired quantity, and unit consistency.
