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

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Definitions:

Maturities

The set dates when the principal amount of a debt instrument, such as a bond or loan, is to be paid back to the lender.

Unfunded Liabilities

Future retirement benefits and other obligations not covered by assets or financial reserves, often discussed in the context of pension plans.

Notes

Short-term or medium-term debt obligations issued by companies or governments.

Floating-Rate Bonds

Bonds with variable interest rates that adjust periodically based on a benchmark or index rate.