« previous next »

Author Question: Which of the following would be an appropriate null hypothesis? A) The mean of a population is ... (Read 38 times)

torybrooks

  • Hero Member
  • *****
  • Posts: 500
on: Jun 24, 2018
Which of the following would be an appropriate null hypothesis?
 
  A) The mean of a population is equal to 55. B) The mean of a sample is equal to 55.
  C) The mean of a population is greater than 55. D) Only A and C are appropriate.

Question 2

A university system enrolling hundreds of thousands of students is considering a change in the way students pay for their education. Currently, the students pay 400 per credit hour. The university system administrators are contemplating charging each student a set fee of 7,000 per quarter, regardless of how many credit hours each takes. To see if this proposal would be economically feasible, the administrators would like to know how many credit hours, on the average, each student takes per quarter. A random sample of 250 students yields a mean of 14.1 credit hours per quarter and a standard deviation of 2.3 credit hours per quarter. Suppose the administration wanted to estimate the mean to within 0.1 hours at 95 reliability and assumed that the sample standard deviation provided a good estimate for the population standard deviation. How large a total sample would they need to take?
 
  What will be an ideal response?


ebenov

  • Sr. Member
  • ****
  • Posts: 331
Reply #1 on: Jun 24, 2018
Answer to Question 1

A

Answer to Question 2

n = 2033


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.

Did you know?

About 60% of newborn infants in the United States are jaundiced; that is, they look yellow. Kernicterus is a form of brain damage caused by excessive jaundice. When babies begin to be affected by excessive jaundice and begin to have brain damage, they become excessively lethargic.

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.

Did you know?

Less than one of every three adults with high LDL cholesterol has the condition under control. Only 48.1% with the condition are being treated for it.

Did you know?

The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).

Exponential growth in the Canadian migratory population of the whooping crane after 70 years of cons Exponential growth in the Canadian migratory population of the whooping crane after 70 years of cons
Over nearly 30 years, humans removed many polar bears for a variety of reasons, from a population in Over nearly 30 years, humans removed many polar bears for a variety of reasons, from a population in
Bell Curve for Intelligence IQ scores for a population-based sample usually fall into this kind of Bell Curve for Intelligence IQ scores for a population-based sample usually fall into this kind of
Population and Settlement Population and Settlement
Calico cat illustrates the Lyon hypothesis Calico cat illustrates the Lyon hypothesis
Population distribution patterns Population distribution patterns
Video: Flexor reflex & Crossed extensor reflex

For a complete list of videos, visit our video library