« previous next »

Author Question: Variance is defined as the a. average of the deviations around the mean. b. average of the ... (Read 79 times)

anjilletteb

  • Hero Member
  • *****
  • Posts: 569
on: Jun 20, 2018
Variance is defined as the
 
  a. average of the deviations around the mean.
  b. average of the squared deviations around the mean.
  c. sum of the deviations around the mean, squared.
  d. sum of the squared deviations around the mean.

Question 2

When computing the variance, why do we square the deviations from the mean?
 
  a. To return the units of measure to their original form
  b. To compensate for the fact that the number of degrees of freedom is different from N
  c. To transform the raw scores into squared scores
  d. To compensate for the fact deviations about the mean always sum to zero


Loise Hard

  • Sr. Member
  • ****
  • Posts: 340
Reply #1 on: Jun 20, 2018
Answer to Question 1

b

Answer to Question 2

d


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.

Did you know?

Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.

Did you know?

Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

Did you know?

The largest baby ever born weighed more than 23 pounds but died just 11 hours after his birth in 1879. The largest surviving baby was born in October 2009 in Sumatra, Indonesia, and weighed an astounding 19.2 pounds at birth.

Did you know?

When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

Menstrual cycle summary based on a 28-day (average) menstrual cycle. Menstrual cycle summary based on a 28-day (average) menstrual cycle.
The "Emu in the sky," a constellation defined by dark clouds rather than the stars. The "Emu in the sky," a constellation defined by dark clouds rather than the stars.
Functional MRI Scans These scans of human brains show localized average increases in neural activity Functional MRI Scans These scans of human brains show localized average increases in neural activity
Average Normal Blood Pressure Readings Average Normal Blood Pressure Readings
Common Causes of Walking Gait Deviations Common Causes of Walking Gait Deviations
Sources of phenotypic variance Sources of phenotypic variance
Video: Molecules, Membrane Permeability and Structure

For a complete list of videos, visit our video library