What Is the Minimum Sample Size Required to Estimate a Population

question 14

Multiple Choice

What is the minimum sample size required to estimate a population mean with 90% confidence when the desired margin of error is D = 1.25? The standard deviation in a preselected sample is 8.5.

• A) n = 76
• B) n = 125
• C) n = 126
• D) n = 190

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Definitions:

Routine Yearly

An event or activity that is performed or occurs as a matter of annual habit or practice.

Motor Vehicle Crashes

Incidents involving the collision of automobiles, leading to property damage, injuries, or fatalities.

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Actions or behaviors that have a significant potential for causing harm or injury.

Texting

The act of sending and receiving short written messages, typically using a mobile phone or another electronic device.