« previous next »

Author Question: An engineer for an electric fencing company is interested in the mean length of wires being cut ... (Read 34 times)

tuffie

  • Hero Member
  • *****
  • Posts: 534
on: Jun 24, 2018
An engineer for an electric fencing company is interested in the mean length of wires being cut automatically by machine. The desired length of the wires is 12 feet. It is known that the standard deviation in the cutting length is 0.15 feet. Suppose the engineer decided to estimate the mean length to within 0.025 with 99 confidence. What sample size would be needed?

Question 2

If the Durbin-Watson statistic d has values smaller than 2, this indicates
 a. a positive first-order autocorrelation
  b. a negative first-order autocorrelation
  c. no first-order autocorrelation at all
  d. None of these choices.


missalyssa26

  • Sr. Member
  • ****
  • Posts: 327
Reply #1 on: Jun 24, 2018
Answer to Question 1

n = 240 (using z = 2.58)

Answer to Question 2

A


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

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?

Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.

Did you know?

Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

Did you know?

Certain topical medications such as clotrimazole and betamethasone are not approved for use in children younger than 12 years of age. They must be used very cautiously, as directed by a doctor, to treat any child. Children have a much greater response to topical steroid medications.

Did you know?

When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.

Engine and electric motor for the Toyota Prius Engine and electric motor for the Toyota Prius
Christian Gladu, The Bungalow Company, The Birch, North Town Woods, Bainbridge Christian Gladu, The Bungalow Company, The Birch, North Town Woods, Bainbridge
Measuring the Weight and Length of an Infant Measuring the Weight and Length of an Infant
MAP sensors use three wires: 1.5 volt reference from the PCM 2. Sensor signal (output signal) 3. ... MAP sensors use three wires: 1.5 volt reference from the PCM 2. Sensor signal (output signal) 3. ...
In a Millikan experiment, a 6.89E-14 kg charged oil droplet is suspended in the electric field ... In a Millikan experiment, a 6.89E-14 kg charged oil droplet is suspended in the electric field ...
Jia's Fashions recently paid a $2 annual dividend. The company is projecting that its ... Jia's Fashions recently paid a $2 annual dividend. The company is projecting that its ...
Video: Cellular defenses (natural killer cells, phagocyte types & process of phagocytosis)

For a complete list of videos, visit our video library