Author Question: The _________ refers to the difference among different astronomersestimation of the time and ... (Read 67 times)

londonang

  • Hero Member
  • *****
  • Posts: 540
The _________ refers to the difference among different astronomersestimati on of the time and position of astral events.
 
  a. personal equation
  b. simple reaction
  c. choice reaction
  d. subtractive logic

Question 2

Differential history effects are a threat to internal validity for which of the following designs?
 
  a. differential research design
 b. one-group pretestposttest design
 c. pretest-posttest nonequivalent control group design
  d. longitudinal design



TDubDCFL

  • Sr. Member
  • ****
  • Posts: 357
Answer to Question 1

A

Answer to Question 2

c



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

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

Did you know?

More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.

Did you know?

In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

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).

Did you know?

There are approximately 3 million unintended pregnancies in the United States each year.

For a complete list of videos, visit our video library