What Sample Size Is Needed to Estimate a Population Mean

question 82

Multiple Choice

What sample size is needed to estimate a population mean within ±50 of the true mean value using a confidence level of 95%, if the true population variance is known to be 122,500?

• A) 211
• B) 155
• C) 214
• D) 189

---

Definitions:

Clean And Professional

A description of a design or layout that is tidy, well-organized, and suitable for a business environment.

Effective Résumé Design

The strategic layout and organization of a résumé to maximize its impact and improve the chances of securing a job interview.

Clarity And Conciseness

Clarity and conciseness refer to the quality of being clear and straightforward in communication, avoiding unnecessary words or complexity.

Classic, Conservative Design

A design approach that emphasizes simplicity, traditional elements, and a restrained color palette to achieve a timeless aesthetic.