This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A glass company produces panes of glass that have specifications for a thickness of 0.3 inches. The ... (Read 71 times)

audragclark

  • Hero Member
  • *****
  • Posts: 579
on: Jun 24, 2018
A glass company produces panes of glass that have specifications for a thickness of 0.3 inches. The process standard deviation is known to be 0.04 inches. A random sample of 45 panes of glass has an average thickness of 0.322 inches. What is the 90 confidence interval around the mean? What can we say about this process?

Question 2

A random sample of thirty daily water productions (expressed in thousands) for a given city yielded a mean of 2489.067 and standard deviation of 74.67 . What are the point estimates for the true mean daily water production and the point estimate for the variance of this population? Mean = ___________________ _ Variance = ___________________ _
 Fill in the blank(s) with correct word


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

rosiehomeworddo

  • Sr. Member
  • ****
  • Posts: 306
Reply #1 on: Jun 24, 2018
Answer to Question 1

0.312 inches, 0.332 inches. Since this interval does not include the 0.30 inches in the specifications, the process is not performing satisfactorily.

Answer to Question 2

2489.067; 5575.61


audragclark

  • Member
  • Posts: 579
Reply 2 on: Jun 24, 2018
Wow, this really help

CAPTAINAMERICA

  • Member
  • Posts: 325
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

The horizontal fraction bar was introduced by the Arabs.

Did you know?

The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.

Did you know?

Vaccines prevent between 2.5 and 4 million deaths every year.

Did you know?

In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.

Did you know?

Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

Although crassly put by the cartoonist, behind the glass ceiling lies this background assumption. Although crassly put by the cartoonist, behind the glass ceiling lies this background assumption.
An oscillating needle 1 or 2 inches Hg below normal could indicate an incorrect air–fuel mixture ... An oscillating needle 1 or 2 inches Hg below normal could indicate an incorrect air–fuel mixture ...
A Hall-effect sensor produces a digital on-off voltage signal whether it is used with a blade or a ... A Hall-effect sensor produces a digital on-off voltage signal whether it is used with a blade or a ...
Using a gauge that measures vacuum in units of inches of water to test the vacuum at the dipstick ... Using a gauge that measures vacuum in units of inches of water to test the vacuum at the dipstick ...
Leg pull. Grasp both feet behind the heels, and gently pull legs straight toward you several inches ... Leg pull. Grasp both feet behind the heels, and gently pull legs straight toward you several inches ...
An organizational specialist is hired as a consultant to a company planning to open a coffee ... An organizational specialist is hired as a consultant to a company planning to open a coffee ...
Video: Structures that affect circulation - kidneys, blood volume and venous tone

For a complete list of videos, visit our video library