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 116 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
Great answer, keep it coming :)

brbarasa

  • Member
  • Posts: 308
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

Did you know?

According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

Did you know?

Signs and symptoms that may signify an eye tumor include general blurred vision, bulging eye(s), double vision, a sensation of a foreign body in the eye(s), iris defects, limited ability to move the eyelid(s), limited ability to move the eye(s), pain or discomfort in or around the eyes or eyelids, red or pink eyes, white or cloud spots on the eye(s), colored spots on the eyelid(s), swelling around the eyes, swollen eyelid(s), and general vision loss.

Did you know?

Drug-induced pharmacodynamic effects manifested in older adults include drug-induced renal toxicity, which can be a major factor when these adults are experiencing other kidney problems.

Did you know?

The most dangerous mercury compound, dimethyl mercury, is so toxic that even a few microliters spilled on the skin can cause death. Mercury has been shown to accumulate in higher amounts in the following types of fish than other types: swordfish, shark, mackerel, tilefish, crab, and tuna.

Estimating cicada population size and predation rates by birds. Estimating cicada population size and predation rates by birds.
From left to right: Size development, biometrical changes in the cranium, reduction of toes ... From left to right: Size development, biometrical changes in the cranium, reduction of toes ...
In 1891 William Dean Howells championed the poetry of Emily Dickinson: “This poetry is as characteri In 1891 William Dean Howells championed the poetry of Emily Dickinson: “This poetry is as characteri
palaeous life palaeous life
Thangka depicting Bhavacakra (Wheel of Life), Bhutan. Thangka depicting Bhavacakra (Wheel of Life), Bhutan.
Life cycle of Plasmodium. Life cycle of Plasmodium.
Video: Electromagnetic Spectrum, Chlorophyll and Pigment & Light

For a complete list of videos, visit our video library