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

Author Question: When should you use a nonparametric test? If the normality assumptions are met, are you better off ... (Read 80 times)

pepyto

  • Hero Member
  • *****
  • Posts: 547
When should you use a nonparametric test? If the normality assumptions are met, are you better off using a parametric t-test to a nonparametric Rank Test?
 
  What will be an ideal response?

Question 2

Find a 90 confidence interval for the mean rating given by all freshmen and sophomores on the campus.
 
  A) 3.98  0.592
  B) 3.98  0.229
  C) 3.98  0.712
  D) 3.98  0.456



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

shoemake

  • Sr. Member
  • ****
  • Posts: 343
Answer to Question 1

Frequently, the assumption of normality is reasonable. Moreover, by virtue of the central limit theorem, many of these test procedures remain approximately valid when applied to large samples even if the population distribution is not normal. However, it may be the case that in practical applications the normality assumption is not tenable. In these circumstances, it is desirable to base inferences on nonparametric tests that are valid over a wide range of distributions of the parent population. Such tests are often referred to as distribution-free tests. The parametric tests tend to use all the sample information. Hence, they do not lose the information that is lost when ranking the data. Intuitively they are better, because you know more. Mathematically they are better because they are more powerful. If a parametric test is reasonable it is preferable to a rank test.

Answer to Question 2

B




pepyto

  • Member
  • Posts: 547
Reply 2 on: Jun 24, 2018
Excellent


bigcheese9

  • Member
  • Posts: 333
Reply 3 on: Yesterday
:D TYSM

 

Did you know?

According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.

Did you know?

You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

Did you know?

Blastomycosis is often misdiagnosed, resulting in tragic outcomes. It is caused by a fungus living in moist soil, in wooded areas of the United States and Canada. If inhaled, the fungus can cause mild breathing problems that may worsen and cause serious illness and even death.

Did you know?

People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.

Did you know?

Anti-aging claims should not ever be believed. There is no supplement, medication, or any other substance that has been proven to slow or stop the aging process.

For a complete list of videos, visit our video library