Question 5 The lifetimes, in hours, of a certain make of light bulbs are assumed to be Normally distributed with a mean

Business, Finance, Economics, Accounting, Operations Management, Computer Science, Electrical Engineering, Mechanical Engineering, Civil Engineering, Chemical Engineering, Algebra, Precalculus, Statistics and Probabilty, Advanced Math, Physics, Chemistry, Biology, Nursing, Psychology, Certifications, Tests, Prep, and more.
Post Reply
answerhappygod
Site Admin
Posts: 899604
Joined: Mon Aug 02, 2021 8:13 am

Question 5 The lifetimes, in hours, of a certain make of light bulbs are assumed to be Normally distributed with a mean

Post by answerhappygod »

Question 5 The Lifetimes In Hours Of A Certain Make Of Light Bulbs Are Assumed To Be Normally Distributed With A Mean 1
Question 5 The Lifetimes In Hours Of A Certain Make Of Light Bulbs Are Assumed To Be Normally Distributed With A Mean 1 (49.58 KiB) Viewed 20 times
Question 5 The lifetimes, in hours, of a certain make of light bulbs are assumed to be Normally distributed with a mean of 5500 hours and a standard deviation of 120. a) Find the probability that the lifetime of a light bulb picked at random will exceed 5764 hours. [3] b) Determine the lifetime not achieved by 0.4% of these light bulbs. [3] Thirty of these light bulbs are selected. c) Find the probability that two out of these thirty light bulbs will have a lifetime exceeding 5764 hours. [4]
Join a community of subject matter experts. Register for FREE to view solutions, replies, and use search function. Request answer by replying!
Top
Post Reply

Return to “Archived Questions & Answers”