The lifetime of a semiconductor laser has a lognormal distribution, and it is known that the mean and standard deviation of lifetime are10000 and 20000, respectively.(a) Calculate the parameters of the lognormal distribution. (Round the answers to 4 decimal places.)0 =8.4058@= 1.2686(b) Determine the probability that a lifetime exceeds 11000 hours. (Round the answer to 3 decimal places.)0.480(c) Determine the lifetime that is exceeded by 90% of lasers. (Round the answer to 1 decimal place.)2490.0hoursStatistical Tables and Charts In a data communication system, several messages that arrive at a node are bundled into a packet before they are transmitted over thenetwork. Assume the messages arrive at the node according to a Poisson process with λ = 34 messages per minute. Five messagesare used to form a packet. Round your answers to three decimal places (e.g. 98.765).a) What is the mean time until a packet is formed, that is, until five messages arrived at the node? 8.824secondsb) What is the standard deviation of the time until a packet is formed? 3.946secondsc) What is the probability that a packet is formed in less than 10 seconds? i 0.332d) What is the probability that a packet is formed in less than 5 seconds? 0.1575

Given: mean,μ = 10000 standard deviation, θ = 20000 Formula used: θ = ln μ2σ2+μ2 ω=lnσ2μ2+1

The lifetime of a semiconductor laser has a lognormal distribution, and it is known that the mean and standard deviation of lifetime ar 10000 and 20000, respectively. (a) Calculate the parameters of the lognormal distribution. (Round the answers to 4 decimal places.) 0= 8.4058 ()= 1.2686 (b) Determine the probability that a lifetime exceeds 11000 hours. (Round the answer to 3 decimal places.) 0.480 (c) Determine the lifetime that is exceeded by 90% of lasers. (Round the answer to 1 decimal place.) 2490.0 hours

The lifetime of a semiconductor laser has a lognormal distribution, and it is known that the mean and standard deviation of lifetime ar 10000 and 20000, respectively. (a) Calculate the parameters of the lognormal distribution. (Round the answers to 4 decimal places.) 0= 8.4058 ()= 1.2686 (b) Determine the probability that a lifetime exceeds 11000 hours. (Round the answer to 3 decimal places.) 0.480 (c) Determine the lifetime that is exceeded by 90% of lasers. (Round the answer to 1 decimal place.) 2490.0 hours

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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