« previous next »

Author Question: A certain brand of batteries has a lifetime that has a normal distribution with a mean of 3,750 ... (Read 83 times)

WhattoUnderstand

  • Hero Member
  • *****
  • Posts: 517
on: Jun 24, 2018
A certain brand of batteries has a lifetime that has a normal distribution with a mean of 3,750 hours and a standard deviation of 300 hours. What lifetime should the manufacturer advertise for these batteries in order that only 2 of the lamps will wear out before the advertised lifetime?

Question 2

A certain brand of batteries has a lifetime that has a normal distribution with a mean of 3,750 hours and a standard deviation of 300 hours. What proportion of these batteries will last between 3,800 and 4,100 hours?


Sierray

  • Sr. Member
  • ****
  • Posts: 343
Reply #1 on: Jun 24, 2018
Answer to Question 1

3135

Answer to Question 2

0.3115


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The cure for trichomoniasis is easy as long as the patient does not drink alcoholic beverages for 24 hours. Just a single dose of medication is needed to rid the body of the disease. However, without proper precautions, an individual may contract the disease repeatedly. In fact, most people develop trichomoniasis again within three months of their last treatment.

Did you know?

To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.

Did you know?

Carbamazepine can interfere with the results of home pregnancy tests. If you are taking carbamazepine, do not try to test for pregnancy at home.

Did you know?

Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.

Did you know?

The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.

Chest Configurations, Normal Adult, Barrel Chest, Pectus Carinatum, Pectus Excavatum Chest Configurations, Normal Adult, Barrel Chest, Pectus Carinatum, Pectus Excavatum
Normal bone versus bone with osteoporosis. Normal bone versus bone with osteoporosis.
Changes in the bronchioles during an asthma attack: (a) Normal bronchiole; (b) the inflammatory comp Changes in the bronchioles during an asthma attack: (a) Normal bronchiole; (b) the inflammatory comp
The anatomical distortion of the structure of RBCs in sickle cell anemia affects its normal function ... The anatomical distortion of the structure of RBCs in sickle cell anemia affects its normal function ...
How the Distribution of Education Affects the Distribution of Income How the Distribution of Education Affects the Distribution of Income
Normal (A) and Abnormal (B) Balance between Dopamine and Acetylcholine Normal (A) and Abnormal (B) Balance between Dopamine and Acetylcholine
Video: Factors that affect conduction rates (myelination, axon diameter & temperature)

For a complete list of videos, visit our video library