« previous next »

Author Question: The Wilcoxon rank sum test statistic W is approximately normally distributed whenever both sample ... (Read 167 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?

As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.

Did you know?

Russia has the highest death rate from cardiovascular disease followed by the Ukraine, Romania, Hungary, and Poland.

Did you know?

Amphetamine poisoning can cause intravascular coagulation, circulatory collapse, rhabdomyolysis, ischemic colitis, acute psychosis, hyperthermia, respiratory distress syndrome, and pericarditis.

Did you know?

The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

Did you know?

The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.

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
Test for Depressive Symptoms: CED Scale Test for Depressive Symptoms: CED Scale
Benedict's test results Benedict's test results
Schamroth test A. Healthy nail B. Clubbing Schamroth test A. Healthy nail B. Clubbing
The fluctuation test of Luria and Delbrück The fluctuation test of Luria and Delbrück
Video: Apicomplexan life cycle Animation

For a complete list of videos, visit our video library