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5. Distributions (a) Write down the formula for the density of the exponential distribution. (b) What does it mean that a random variable coming from an exponential has no memory? (c) Prove that an exponentially distributed random variable has no memory.

5. Distributions (a) Write down the formula for the density of the exponential distribution. (b) What does it mean that a random variable coming from an exponential has no memory? (c) Prove that an exponentially distributed random variable has no memory.

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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5. Distributions. (a) Write down the formula for the density of the exponential distribution. (b) What does it mean that a random variable coming from an exponential has no memory? (c) Prove that an exponentially distributed random variable has no memory.
Transcribed Image Text:5. Distributions. (a) Write down the formula for the density of the exponential distribution. (b) What does it mean that a random variable coming from an exponential has no memory? (c) Prove that an exponentially distributed random variable has no memory.
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