This topic contains a solution. Click here to go to the answer

Author Question: The entire collection of individuals or objects about which information is desired is called a ... (Read 172 times)

APUS57

  • Hero Member
  • *****
  • Posts: 571
The entire collection of individuals or objects about which information is desired is called a sample.
   
  1.True
  2.False

Question 2

Suppose the researcher described in 2 wants to test for differences in the ratings of well-being before and after commencing the gluten-free diet. Why might a test for paired differences using the Student's T distribution not be appropriate?
 A. The two measures of well-being are independent.
  B. The two measures of well-being are not quantitative.
  C. The distribution of differences may not be normally distributed.
  D. The difference between the two measures of well-being cannot be computed.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Anton

  • Sr. Member
  • ****
  • Posts: 302
Answer to Question 1

2

Answer to Question 2

C.The distribution of differences may not be normally distributed.

FEEDBACK:
Since the ratings of well-being are measured on a 1 to 5 scale, they are quantitative and differences can be computed. However, since the sample size is small, it's hard to imagine that those differences could be normally distributed. Take a moment to think about what a histogram of those differences might look like. Perhaps make up 10 people and their ratings and then draw a histogram of the differences in those ratings. Such a distribution could take on many shapes, but with a maximum difference of 5 - 1 = 4, the shape is unlikely to be mound-shaped and/or symmetrical, like the normal distribution. While much of the statistics you have learned in this course depends on the data being normally distributed, realize that this necessary assumption is often not the case, particularly when the sample size is small. In this example, the distribution of differences are probably not normally distributed such that you cannot trust that a test using the Student T distribution would produce a valid conclusion.




APUS57

  • Member
  • Posts: 571
Reply 2 on: Jul 24, 2018
YES! Correct, THANKS for helping me on my review


bitingbit

  • Member
  • Posts: 323
Reply 3 on: Yesterday
Great answer, keep it coming :)

 

Did you know?

Disorders that may affect pharmacodynamics include genetic mutations, malnutrition, thyrotoxicosis, myasthenia gravis, Parkinson's disease, and certain forms of insulin-resistant diabetes mellitus.

Did you know?

The Centers for Disease Control and Prevention has released reports detailing the deaths of infants (younger than 1 year of age) who died after being given cold and cough medications. This underscores the importance of educating parents that children younger than 2 years of age should never be given over-the-counter cold and cough medications without consulting their physicians.

Did you know?

On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

Did you know?

Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

Did you know?

A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.

For a complete list of videos, visit our video library