« previous next »

Author Question: An engineer for an electric fencing company is interested in the mean length of wires being cut ... (Read 19 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?

In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.

Did you know?

Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.

Did you know?

Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

Did you know?

The human body produces and destroys 15 million blood cells every second.

Did you know?

The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.

Transduction of mechanical vibrations to electric signals in the organ of Corti. Transduction of mechanical vibrations to electric signals in the organ of Corti.
Reinstall the spark plug wires and all brackets that were removed to gain access to the valve ... Reinstall the spark plug wires and all brackets that were removed to gain access to the valve ...
The relationship between the height of the firing line and length of the spark line can be ... The relationship between the height of the firing line and length of the spark line can be ...
A roller cell-type electric fuel pump. A roller cell-type electric fuel pump.
A gasoline direct-injection (GDI) fuel rail and pump assembly with the electric pressure control ... A gasoline direct-injection (GDI) fuel rail and pump assembly with the electric pressure control ...
Find the length of DE to one decimal place Find the length of DE to one decimal place
Video: Ionic bonds - role of ions in the body

For a complete list of videos, visit our video library