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 89 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
YES! Correct, THANKS for helping me on my review

Liamb2179

  • Member
  • Posts: 365
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

According to animal studies, the typical American diet is damaging to the liver and may result in allergies, low energy, digestive problems, and a lack of ability to detoxify harmful substances.

Did you know?

Most strokes are caused when blood clots move to a blood vessel in the brain and block blood flow to that area. Thrombolytic therapy can be used to dissolve the clot quickly. If given within 3 hours of the first stroke symptoms, this therapy can help limit stroke damage and disability.

Did you know?

Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.

Did you know?

People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.

Did you know?

Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.

A web of life A web of life
The life cycle of a typical fern. The life cycle of a typical fern.
Life cycle of Plasmodium Life cycle of Plasmodium
Marijuana Use and Binge Drinking in Emerging Adulthood Rates of most kinds of substance use peak in Marijuana Use and Binge Drinking in Emerging Adulthood Rates of most kinds of substance use peak in
Is there anything in life that is permanent, or is the world constantly changing? Is there anything in life that is permanent, or is the world constantly changing?
Time Line for Life’s Origin and Evolution Time Line for Life’s Origin and Evolution
Video: DNA close up Animation

For a complete list of videos, visit our video library