In Constructing a Confidence Interval for a Mean with Unknown

question 95

Multiple Choice

In constructing a confidence interval for a mean with unknown variance with a sample of 25 items, Bob used z instead of t. "Well, at least my interval will be wider than necessary, so it was a conservative error," said he. Is Bob's statement correct?

• A)Yes.
• B)No.
• C)It depends on μ.

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Definitions:

High Performance Capability

The ability of an individual or organization to perform at an exceptionally high level, often exceeding standard expectations.

Intellectual

Relating to the ability to think and understand ideas and information at a complex level.

Creative

The quality or ability to create or invent something original and valuable.

Cross-sectional Studies

Research that analyzes data from a population, or a representative subset, at a specific point in time to examine relationships between variables.