The lifetime of a certain brand of battery is known to have a standard deviation of 19.8 hours. Suppose that a random sa

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: 899603
Joined: Mon Aug 02, 2021 8:13 am

The lifetime of a certain brand of battery is known to have a standard deviation of 19.8 hours. Suppose that a random sa

Post by answerhappygod »

The Lifetime Of A Certain Brand Of Battery Is Known To Have A Standard Deviation Of 19 8 Hours Suppose That A Random Sa 1
The Lifetime Of A Certain Brand Of Battery Is Known To Have A Standard Deviation Of 19 8 Hours Suppose That A Random Sa 1 (14.56 KiB) Viewed 11 times
The lifetime of a certain brand of battery is known to have a standard deviation of 19.8 hours. Suppose that a random sample of 90 such batteries has a mean lifetime of 34.6 hours. Based on this sample, find a 99% confidence interval for the true mean lifetime of all batteries of this brand. Then give its lower limit and upper limit. Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a list of formulas.) Lower limit: Upper limit:
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”