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प्रश्न
Choose the correct alternative:
A probability density function may be represented by
पर्याय
Table
Graph
Mathematical equation
Both (b) and (c)
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उत्तर
Both (b) and (c)
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| x | 3 | 4 | 5 |
| P(x) | 0.2 | 0.3 | 0.5 |
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A discrete probability distribution may be represented by
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E[X – E(X)] is equal to
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E[X – E(X)]2 is
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An expected value of a random variable is equal to it’s
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The time to failure in thousands of hours of an important piece of electronic equipment used in a manufactured DVD player has the density function
f(x) = `{{:(2"e"^(-2x)",", x > 0),(0",", "otherwise"):}`
Find the expected life of this piece of equipment
