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

Author Question: When 12 bolts are tested for hardness, their indexes have a standard deviation of 41.7. Test the ... (Read 49 times)

Medesa

  • Hero Member
  • *****
  • Posts: 507
on: Aug 1, 2018
When 12 bolts are tested for hardness, their indexes have a standard deviation of 41.7. Test the claim that the standard deviation of the hardness indexes for all such bolts is greater than 30.0. Use a 0.025 level of significance.
 
  What will be an ideal response?

Question 2

Focus groups of 11 people are randomly selected to discuss products of the Yummy Company. It is determined that the mean number (per group) who recognize the Yummy brand name is 8.3, and the standard deviation is 0.88.
 
  Would it be unusual to randomly select 11 people and find that fewer than 5 recognize the Yummy brand name?
  A) Yes B) No


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

tdewitt

  • Sr. Member
  • ****
  • Posts: 318
Reply #1 on: Aug 1, 2018
Answer to Question 1

Test statistic: X2 = 21.253. Critical value: X2 = 21.920. Fail to reject the null hypothesis. There is not sufficient evidence to support the claim that the standard deviation is greater than 30.0.

Answer to Question 2

A


Medesa

  • Member
  • Posts: 507
Reply 2 on: Aug 1, 2018
Gracias!

LegendaryAnswers

  • Member
  • Posts: 341
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

All patients with hyperparathyroidism will develop osteoporosis. The parathyroid glands maintain blood calcium within the normal range. All patients with this disease will continue to lose calcium from their bones every day, and there is no way to prevent the development of osteoporosis as a result.

Did you know?

Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

Did you know?

Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.

Did you know?

Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.

Did you know?

Inotropic therapy does not have a role in the treatment of most heart failure patients. These drugs can make patients feel and function better but usually do not lengthen the predicted length of their lives.

Inspect the site for potential veins to use and palpate to further locate a vein and test the firmne Inspect the site for potential veins to use and palpate to further locate a vein and test the firmne
A Mono-Diff test in which the presumptive well contains the patient's serum mixed with ... A Mono-Diff test in which the presumptive well contains the patient's serum mixed with ...
How to write a quadratic equation in standard form when a graph is given How to write a quadratic equation in standard form when a graph is given
Blood pressure test Blood pressure test
Measuring the client’s weight with a standard platform scale Measuring the client’s weight with a standard platform scale
Heel-to-shin test Heel-to-shin test
Video: ADH and the arterioles, kidneys, sweat glands and the Atrial natriuretic peptide (ANP)

For a complete list of videos, visit our video library