Constructing a Confidence Interval In Exercises 31 and 32, use the data set to (a) find the sample mean, (b) find the sample standard deviation, and (c) construct a 98% confidence interval for the population mean. 31. Earnings The annual earnings (in dollars) of 32 randomly selected magnetic resonance imaging technologists (Adapted from Salary.com) 90,198 65,357 62,108 78,201 80,882 74,759 46,382 75,196 56,412 74,610 65,460 68,066 53,610 92,391 57,579 99,477 42,363 47,315 67,769 50,110 92,437 58,188 76,515 65,997 42,713 77,745 57,928 94,066 61,748 91,868 62,445 70,359
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.
pg 315 question 31
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