Author Question: Which of the following measures is merely a simple difference score? a. Standard deviation = 2.41 ... (Read 72 times)

Evvie72

  • Hero Member
  • *****
  • Posts: 519
Which of the following measures is merely a simple difference score?
 
  a. Standard deviation = 2.41
  b. Difference scores = 2, 2, 1, +2, and +3
  c. Range = 8
  d. Variance = 5.80

Question 2

In the data set below, what is the mean ( )? X f 5 4 4 2 3 1 2 1 1 2
 
  a. 4
  b. 3.5
  c. 3
  d. 2.5



nicoleclaire22

  • Sr. Member
  • ****
  • Posts: 318
Answer to Question 1

ANS: A
The simplest measure of dispersion is the range. In published studies, range is presented in two ways: (1) the range is the lowest and highest scores, or (2) the range is calculated by subtracting the lowest score from the highest score. In this form, the range is a difference score that uses only the two extreme scores for the comparison. The range is generally reported in published studies but is not used in further analyses.

Answer to Question 2

ANS: B
The measures of central tendency are mode, median (MD), and mean ( ). The mean is the arithmetic average of all a variable's values in a study and is the most commonly reported measure of central tendency. The mean is the sum of the scores divided by the number of scores being summed. Mean ( ) =  N = 35  10 = 3.5.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.

Did you know?

Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.

Did you know?

The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.

Did you know?

Fatal fungal infections may be able to resist newer antifungal drugs. Globally, fungal infections are often fatal due to the lack of access to multiple antifungals, which may be required to be utilized in combination. Single antifungals may not be enough to stop a fungal infection from causing the death of a patient.

Did you know?

In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.

For a complete list of videos, visit our video library