We Draw a Random Sample of Size 25 from the Normal

question 55

Multiple Choice

We draw a random sample of size 25 from the normal population with the variance 2.4.If the sample mean is 12.5,what is a 99% confidence interval for the population mean?

• A)[11.2600,13.7400]
• B)[11.3835,13.6165]
• C)[11.7019,13.2981]
• D)[11.7793,13.2207]

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Definitions:

Research Journals

Publications that contain articles on recent research findings in specific academic fields.

Probability Samples

Sampling methods in which every member of a population has a known chance of being selected.

Chance Selection

A method of decision-making or selection that relies on random or unforeseeable factors without systemic bias.

Pieces Of Data

Individual facts or items of information, often numerical, that are collected through observation, research, or analysis.