If Light Bulbs Have Lives That Are Normally Distributed with a Mean

question 32

Multiple Choice

If light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500 hours, approximately what percentage of light bulbs has a life of more than 3000 hours?

• A) About 84%
• B) About 68%
• C) About 32%
• D) About 16%

Recognize the conditions under which the CLT applies to both continuous and discrete distributions.

Understand the concept of standard error and its significance in describing the variability of sample statistics.

Comprehend the impact of sample size on the sampling distribution, including effects on the standard error and the shape of the distribution.

Differentiate between the concepts of a sampling distribution and the distribution of sample data.

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Definitions:

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