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 154 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
Excellent

chereeb

  • Member
  • Posts: 326
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

When taking monoamine oxidase inhibitors, people should avoid a variety of foods, which include alcoholic beverages, bean curd, broad (fava) bean pods, cheese, fish, ginseng, protein extracts, meat, sauerkraut, shrimp paste, soups, and yeast.

Did you know?

Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.

Did you know?

Oxytocin is recommended only for pregnancies that have a medical reason for inducing labor (such as eclampsia) and is not recommended for elective procedures or for making the birthing process more convenient.

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

There are approximately 3 million unintended pregnancies in the United States each year.

The Grants and natural selection of beak size among the medium ground finch. The Grants and natural selection of beak size among the medium ground finch.
The Tree of Life The Tree of Life
A consensus tree of life A consensus tree of life
Although average brain size increases gradually though time in H. erectus, individuals with small br Although average brain size increases gradually though time in H. erectus, individuals with small br
Drag the labels to indicate the change in the size of the reservoir. . . Drag the labels to indicate the change in the size of the reservoir. . .
Butterfly life cycle stages June 6 2023 Butterfly life cycle stages June 6 2023
Video: The Lagging Strand in DNA Replication and Replication in Action

For a complete list of videos, visit our video library