PATHOLOGY

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PATHOLOGY MCQ

ENDOCRINE SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Scientist studying memory want to know whether a set of numbers (24156) or a set of letters (BJRFS) is easier to remember. What would be one constant (or controlled) variable that the scientist would use in this investigation?
A
number of correct answers
B
the length of the sets-5 numbers and 5 letters
C
height of the people being tested
D
None of the above
Explanation: 

Detailed explanation-1: -The independent variable is the one that is changed by the scientist. To insure a fair test, a good experiment has only ONE independent variable. As the scientist changes the independent variable, he or she records the data that they collect.

Detailed explanation-2: -A constant variable, sometimes known as a control variable, is something you keep the same during an experiment.

Detailed explanation-3: -The use of a controlled study is the most effective way of establishing causality between variables. In a controlled study, the sample or population is split in two, with both groups being comparable in almost every way.

Detailed explanation-4: -There are three main variables: independent variable, dependent variable and controlled variables. Example: a car going down different surfaces.

There is 1 question to complete.
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