Answer:
c. Observational studies have both independent and dependent variables.
d. Observational studies can be used to test hypothesis.
Explanation:
Observational studies are ones in which a researcher makes observations about his thoughts and views. He observes the risk and other effects before actual test takes place. This is usually the initial phase of research where observations are made for suitability of certain things that are to be researched. There is initial feasibility test conducted to identify whether the further research process is beneficial or not.
Answer:
The testing effects
Explanation:
Testing effects are finding a long term memory which improved by when some of the time is given to retrieving to be remembered information. It is also called retrieval practice, practice testing, or test enhanced learning. The testing effect is different from general information, practice test. This process is useful for people who want to test their memory. Through the testing effect, a person can improve their knowledge.
For example, a student can use flashcards or any practice st to judge his/ her knowledge.
I'm noticing that you don't get lots of sleep and that's why your grades are low. Also, you have to be doing your homework right away and/or study for a test and not being on your phone too much or on any device.
-Hope this helps!!!
