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Find the Necessary Sample Size

question 39

Multiple Choice

Find the necessary sample size.
-Scores on a certain test are normally distributed with a variance of 68. A researcher wishes to estimate the mean score achieved by all adults on the test. Find the sample size needed to assure With 95 percent confidence that the sample mean will not differ from the population mean by more Than 4 units.

Definitions:

Industry Segments

Specific categories within an industry that companies can be classified under based on their main business activities.

Revenue Test

A criterion used to determine whether a business segment's revenue is sufficient for it to be considered a reportable segment under financial reporting standards.

Separately Reportable

Items or activities that must be individually disclosed in financial statements due to their significance or regulatory requirements.

Operating Profit Or Loss Test

A financial measure used to determine a company's profitability from its core business operations, excluding non-operational factors.