« previous next »

Author Question: The Wilcoxon rank sum test statistic W is approximately normally distributed whenever both sample ... (Read 105 times)

ssal

  • Hero Member
  • *****
  • Posts: 572
on: Jun 24, 2018
The Wilcoxon rank sum test statistic W is approximately normally distributed whenever both sample sizes are at least:
 a. 10.
  b. 15.
  c. 20.
  d. 25.
  e. 30.

Question 2

A Wilcoxon rank sum test for comparing two populations involves two independent samples of sizes 15 and 20 . The un-standardized test statistic (that is the rank sum) is W = 210 . The value of the standardized test statistic (that is, the value of z-approximation test statistic) is:
 a. 14.
  b. 10.5.
  c. 6.
  d. -1.4.
  e. -8.


jharrington11

  • Sr. Member
  • ****
  • Posts: 365
Reply #1 on: Jun 24, 2018
Answer to Question 1

A

Answer to Question 2

D


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.

Did you know?

Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

Did you know?

The average adult has about 21 square feet of skin.

Did you know?

Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.

Did you know?

Aspirin may benefit 11 different cancers, including those of the colon, pancreas, lungs, prostate, breasts, and leukemia.

Man undergoing a stress test on a treadmill while physician monitors his condition Man undergoing a stress test on a treadmill while physician monitors his condition
The Hanuman langur, a widely distributed Asian colobine. The Hanuman langur, a widely distributed Asian colobine.
Monitoring and Following Up on Laboratory Test Results Monitoring and Following Up on Laboratory Test Results
Sample Menu: Carb Choices Sample Menu: Carb Choices
Using the voltmeter leads from a starting and charging test unit to measure the voltage drop ... Using the voltmeter leads from a starting and charging test unit to measure the voltage drop ...
Morgan’s test-cross analysis of genetic linkage between autosomal genes Morgan’s test-cross analysis of genetic linkage between autosomal genes
Video: Introduction to Human Immunodeficiency Virus (HIV)

For a complete list of videos, visit our video library