Answer:
This is an example of: <u>a sample survey.</u>
Explanation:
In the experiment to determine the effect of sleep deprivation on the ability of the student to concentrate definitely needs an experimental setup rather than a randomized data collection.
<em>Do to the fact that, the experimental used a small sample sized area (Students in a calculus class) to test his hypothesis shows that the setup is a sample survey. </em>
<u>This sample survey result could be extrapolated to the whoe region (the classes in the school or whole school ) to determine if there was a major significance between the two variables.</u>
B - Attachment is an important component of an infant's social-emotional, cognitive, and physical development. Without attachment to a certain individual; usually a parent, being present .The child will suffer from abnormal development in most cases.
He was surrounded on three sides by Grant.
Hope I helped! :)
