Actually both a) and b) are correct.
About A): the two groups should be identical (but not the same, i.e. have the same attributes), only the treatment of them - the independent variable should be different.
But the one option to choose is b: The control group is identical to each test group except for one variable. This is the independent variable.
Answer: Mean Central Tendency
Explanation:
Central tendency means the measures in which we use in finding the average value of a statistical series of quantitative data.The mean gives the arithmetic average of a group of scores that is the scores from a data are totaled and divided by the number of scores. Mean as a measure for central tendency is easy to understand, calculate and utilizes all scores of a distribution, However, it tends to be affected by extreme scores giving absurd negative values for example, a couple of extremely low scores can skew the mean so that the average score appears much more lower than most of the scores actually are.
Here, Even though students work hard and do well for most of the grading period, sometimes students get overwhelmed and do poorly on one test, which affects their overall grades-->this is because mean central tendency can give negative absurd values for extreme scores ( in this case, low scores ) in its observation, affecting a student's overall grade.
Explanation:
Modern history is the history of the world beginning after the Middle Ages. Generally the term "modern history" refers to the history of the world since the advent of the Age of Reason and the Age of Enlightenment in the 17th and 18th centuries and the beginning of the Industrial Revolution.
Answer:
\Delta U = Q - W
\Delta U = change in internal energy
Q = heat added
W = work done by the system
Explanation:
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