The operating lifespan of a television picture tube is a:___________?
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Answer: B. Continuous variable
Explanation
Operating lifespan is measured along a continuous scale of time duration. A television picture tube can operate for any fractional number of hours within a range. Variables that take uncountably infinite values along an interval are classified as continuous. Continuous variables involve physical measurements such as time, weight, length, and temperature. Discrete variables, conversely, are restricted to distinct countable whole number values. Probability density functions describe the behavior of continuous random variables in statistics.
Reliability engineers analyze continuous lifespan data to estimate product warranty failure rates. Manufacturers test component durability to ensure electronic devices meet required longevity standards. Choosing correct variable types ensures appropriate statistical tests are applied to reliability data. Option A is incorrect because lifespan cannot be restricted to separate countable integers alone. Option C refers to categorical attributes rather than measurable quantitative variables. Option D is wrong because lifespan varies across individual units and is not a fixed constant.
- Subject
- Mathematics
- Category
- Statistics
- Topic
- —
- Difficulty
- medium
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