The following table gives the frequency distribution of the number of errors committed by a college baseball team in all of the 43 games that it played during the 2011-12 season. Number of Number of Games Errors 11 1 12 9 7 3 1 Find the mean, variance, and standard deviation. (Hint: The classes in this example are single valued. These values of classes will be used as values of m in the formulas for the mean, variance, and standard deviation.) 2 3 4
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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