A researcher is interested in the cholesterol levels of adults in the city in which she lives. A cholesterol screening program is set up in the downtown area during lunch hour. Individuals can walk in and have their cholesterol determined for free. A total of 173 people use the service, and their average cholesterol level is 217.8. The sample obtained is an example of: O a stratified sample of high- and low-cholesterol individuals. O a sample probably containing bias and undercoverage. O a simple random sample, because the experimenter did not know beforehand which individuals would come to the screening.
Angles in Circles
Angles within a circle are feasible to create with the help of different properties of the circle such as radii, tangents, and chords. The radius is the distance from the center of the circle to the circumference of the circle. A tangent is a line made perpendicular to the radius through its endpoint placed on the circle as well as the line drawn at right angles to a tangent across the point of contact when the circle passes through the center of the circle. The chord is a line segment with its endpoints on the circle. A secant line or secant is the infinite extension of the chord.
Arcs in Circles
A circular arc is the arc of a circle formed by two distinct points. It is a section or segment of the circumference of a circle. A straight line passing through the center connecting the two distinct ends of the arc is termed a semi-circular arc.
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