If the Estimated Population Standard Deviation Based on Previous Studies

question 37

Multiple Choice

If the estimated population standard deviation based on previous studies is 20 percent, the acceptable error is plus or minus 5 percent, and the z-value for a 95 percent level of confidence is 1.96, the needed sample size is approximately:

• A) 48.
• B) 210.
• C) 61.
• D) 153.
• E) 196.

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Definitions:

Online Retailer

A business that sells goods or services over the internet directly to consumers.

Bricks And Mortar

Traditional physical retail stores, as opposed to online or virtual stores.

Physical Products

Tangible items or goods that are manufactured, sold, and used in commerce, as opposed to digital or virtual products.

Online Sales

Transactions that occur on the internet where buyers purchase goods or services from sellers over digital platforms.