« previous next »

Author Question: Mortality is a threat to the validity of a study that is caused by _____. a. the lack of random ... (Read 69 times)

Mimi

  • Hero Member
  • *****
  • Posts: 542
on: Jun 19, 2018
Mortality is a threat to the validity of a study that is caused by _____.
 
  a. the lack of random assignment
  b. having only one group of subjects
  c. comparing subjects who are at different stages of development
  d. some subjects failing to complete the study

Question 2

In inferential statistics random sampling is regarded as desirable but not essential.
 
  Indicate whether the statement is true or false


yotaSR5

  • Sr. Member
  • ****
  • Posts: 331
Reply #1 on: Jun 19, 2018
Answer to Question 1

D
Mortality refers to the drop-out rate.

Answer to Question 2

F


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.

Did you know?

The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

Did you know?

Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.

Did you know?

Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

Did you know?

Complications of influenza include: bacterial pneumonia, ear and sinus infections, dehydration, and worsening of chronic conditions such as asthma, congestive heart failure, or diabetes.

Inflammation. Inflammation is characterized by the presence of swelling, redness, heat, and pain. Sw Inflammation. Inflammation is characterized by the presence of swelling, redness, heat, and pain. Sw
Brain Damage Caused by Stress Brain Damage Caused by Stress
Model of a longitudinal study in which 983 students were surveyed in 1984 and then again in 1985, 19 Model of a longitudinal study in which 983 students were surveyed in 1984 and then again in 1985, 19
Infant Mortality Rates Worldwide Infant Mortality Rates Worldwide
Absorption & Stripping Design Random packing materials Absorption & Stripping Design Random packing materials
How to Study Physics How to Study Physics
Video: Junction Types - Tight and Adherens Junctions

For a complete list of videos, visit our video library