The research error described above is an example of selection bias.
Selection bias takes place when, from a population of interest, a group of individuals is selected in order to construct a sample but without a proper randomization. The result is a sample which is not representative of the underlying population.
According to the example, the target population of the research comprises all students but the sample only includes boys. Hence, selection has not been random because it followed a gender criteria, and the results obtained using it cannot be applicable to the whole population because they are affected by a selection bias.
ericans have often prided themselves on their rich diversity. Nowhere was that diversity more evident in pre-Revolutionary America than in the MIDDLE COLONIES of Pennsylvania, New York, New Jersey, and Delaware. European ethnic groups as manifold as English, Swedes, Dutch, Germans, Scots-Irish and French lived in closer proximity than in any location on continental Europe. The middle colonies contained Native American tribes of Algonkian and Iroquois language groups as well as a sizable percentage of African slaves during the early years. Unlike solidly Puritan New England, the middle colonies presented an assortment of religions. The presence of Quakers, MENNONITES, LUTHERANS, DUTCH CALVINISTS, and PRESBYTERIANS made the dominance of one faith next to impossible.
The middle colonies included Pennsylvania, New York, New Jersey, and Delaware.
Advantaged by their central location, the middle colonies served as important distribution centers in the English mercantile system. New York and Philadelphia grew at a fantastic rate. These cities gave rise to brilliant thinkers such as Benjamin Franklin, who earned respect on both sides of the Atlantic. In many ways, the middle colonies served as the crossroads of ideas during the colonial period.
In contrast to the South where the cash crop plantation system dominated, and New England whose rocky soil made large-scale agriculture difficult, The middle colonies were FERTILE. Land was generally acquired more easily than in New England or in the plantation South. Wheat and corn from local farms would feed the American colonies through their colonial infancy and revolutionary adolescence.
The middle colonies represented exactly that — a middle ground between its neighbors to the North and South. Elements of both New England towns and sprawling country estates could be found. Religious dissidents from all regions could settle in the relatively tolerant middle zone. Aspects of New EnglandSHIPBUILDING and LUMBERING and the large farms of the South could be found. Aptly named, they provided a perfect nucleus for English America.
Explanation:
Compare: They have control over some of the same things like laws, military action, and who there allies are, They both get elected by the public, and they both chose when, where, and how things happen.
Contrast: The dictator has control over everything as one person and nobody else gets a say in things while in democracies there is a whole bunch of chosen people that chose what happen.
Answer:
impulsive shopping
Explanation:
According to my research on social economic statuses Melanie is exhibiting the common characteristics of impulsive shopping (impulse buyer) . People who do this buy products that they do not actually need and make this decision right before actually buying the product without actually thinking about whether or not it is a smart purchase. This is exactly what Melanie is doing with the sunglasses.
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While en route to a call for a patient in cardiac arrest, you approach a stopped school bus with its red warning lights flashing. you should stop and wait until the warning lights stop flashing.
Cardiac arrest occurs when the heart suddenly and unexpectedly stops beating. When this happens, blood flow to the brain and other vital organs stops. Cardiac arrest is caused by certain arrhythmias preventing the heart from pumping blood. Cardiac arrest is a medical emergency.
The heart no longer beats usually. The heart's pumping action "pauses" or stops. Cardiac arrest can quickly lead to death if appropriate measures are not taken immediately. Cardiac arrest can be reversed when CPR is given and the defibrillator shocks the heart to restore normal rhythm within minutes.
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