This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: In tests of a computer component, it is found that the mean time between failures is 520 hours. A ... (Read 18 times)

piesebel

  • Hero Member
  • *****
  • Posts: 565
on: Aug 1, 2018
In tests of a computer component, it is found that the mean time between failures is 520 hours.
 
  A modification is made which is supposed to increase the time between failures. Tests on a random sample of 10 modified components resulted in the following times (in hours) between failures.
   518 548 561 523 536
   499 538 557 528 563
  At the 0.05 significance level, test the claim that for the modified components, the mean time between failures is greater than 520 hours.

Question 2

There are 13 members on a board of directors. If they must form a subcommittee of 5 members, how many different subcommittees are possible?
 
  A) 371,293 B) 154,440 C) 120 D) 1287


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Mholman93

  • Sr. Member
  • ****
  • Posts: 328
Reply #1 on: Aug 1, 2018
Answer to Question 1

Test statistic: t = 2.61. Critical value: t = 1.833. Reject . There is sufficient evidence to support the claim that the mean is greater than 520 hours.

Answer to Question 2

D


piesebel

  • Member
  • Posts: 565
Reply 2 on: Aug 1, 2018
YES! Correct, THANKS for helping me on my review

sultana.d

  • Member
  • Posts: 320
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.

Did you know?

Thyroid conditions may make getting pregnant impossible.

Did you know?

There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

Did you know?

Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.

Did you know?

Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

Common Blood Chemistry Tests Common Blood Chemistry Tests
Adults in the Berlin Study of Aging show earlier declines on tests of nonverbal, fluid tasks (upper ... Adults in the Berlin Study of Aging show earlier declines on tests of nonverbal, fluid tasks (upper ...
Correlations on tests for a number of cognitive abilities are higher for monozygotic twin pairs (who ... Correlations on tests for a number of cognitive abilities are higher for monozygotic twin pairs (who ...
The initial timing is where the spark plug fires at idle speed. The computer then advances the ... The initial timing is where the spark plug fires at idle speed. The computer then advances the ...
Accumulation of toxicants over time and up the food chain Accumulation of toxicants over time and up the food chain
The time at which the mailman delivers the mail to Ace Bike Shop follows a normal distribution ... The time at which the mailman delivers the mail to Ace Bike Shop follows a normal distribution ...
Video: Endocytosis -Types and Phagocytosis

For a complete list of videos, visit our video library