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

Author Question: A producer of various kinds of batteries has been producing D size batteries with a life expectancy ... (Read 146 times)

brutforce

  • Hero Member
  • *****
  • Posts: 540
on: Jun 24, 2018
A producer of various kinds of batteries has been producing D size batteries with a life expectancy of 87 hours. Due to an improved production process, management believes that there has been an increase in the life expectancy of their D size batteries. A sample of 36 batteries showed an average life of 88.5 hours. It is known that the standard deviation of the population is 9 hours.
 a. Give the null and the alternative hypotheses.
  b. Compute the test statistic.
  c. At the 1 level of significance using the critical value approach, test management's belief.
  d. What is the p-value associated with the sample results? What is your conclusion based on the p-value using  = .01?
  e. What is your conclusion based on the p-value using  = .05?

Question 2

With systematic sampling,
 a. the first element selected is a random choice.
  b. every nth element is a random choice.
 c. all elements in the sample are random choices.
  d. there are no random choices.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

tjayeee

  • Sr. Member
  • ****
  • Posts: 329
Reply #1 on: Jun 24, 2018
Answer to Question 1

a. H0:  < 87 hours
Ha:  > 87 hours
b. 1.00
c. Since z = 1 < 2.33, do not reject H0
d. p-value = .1587 > .01; therefore do not reject H0 and conclude that there is insufficient evidence to support the management's belief.
e. p-value = .1587 > .05; therefore, do not reject H0; no evidence to support the management's belief using the 5 level of significance.

Answer to Question 2

a


brutforce

  • Member
  • Posts: 540
Reply 2 on: Jun 24, 2018
Wow, this really help

jackie

  • Member
  • Posts: 324
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Pink eye is a term that refers to conjunctivitis, which is inflammation of the thin, clear membrane (conjunctiva) over the white part of the eye (sclera). It may be triggered by a virus, bacteria, or foreign body in the eye. Antibiotic eye drops alleviate bacterial conjunctivitis, and antihistamine allergy pills or eye drops help control allergic conjunctivitis symptoms.

Did you know?

As many as 20% of Americans have been infected by the fungus known as Histoplasmosis. While most people are asymptomatic or only have slight symptoms, infection can progress to a rapid and potentially fatal superinfection.

Did you know?

About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.

Did you know?

Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

Did you know?

Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.

Alternation of generations, the plant life cycle Alternation of generations, the plant life cycle
Killer Whale - Size comparison to an average human. Killer Whale - Size comparison to an average human.
Kitagawa Utamaro, Utamaro's Studio, Eshi . . . dosa-hiki (the three primary steps in producing ... Kitagawa Utamaro, Utamaro's Studio, Eshi . . . dosa-hiki (the three primary steps in producing ...
Cumulative change for six personality-trait domains across the life course show distinct patterns. Cumulative change for six personality-trait domains across the life course show distinct patterns.
Life cycle of Plasmodium. Life cycle of Plasmodium.
This label on a Toyota Camry hybrid shows the relative smog-producing emissions, but this does not ... This label on a Toyota Camry hybrid shows the relative smog-producing emissions, but this does not ...
Video: Regulation of GFR: three methods, autoregulation & autoregulation via myogenic mechanism

For a complete list of videos, visit our video library