According to an almanac, 606 of adult smokers started smokng before turning 18 years old. (a) Compute the mean and standard deviation of the random varlable X, the number of smokers who started before 18 in 100 trials of the probability experiment. (b) Interpret the mean. (c) Would it be unusual to observe 90 smokers who started smoking before turning 18 years old in a random sample of 100 adult smokers? Why? O A. It is expected that in 50% of random samples of 100 adult smokers, 60 will have started ymoking before tuming 18. B. It is expected that in a random sample of 100 adult smokers, 60 will have started smoking after tuming 18. c. It is expected that in a random sample of 100 adult smokers, 60 will have started smoking before turning 18. (c) Would it be unusual to observe 90 smokers who started smoking before turning 18 years old in a random sample of 100 adult smokers? O A. No, because 90 is between u-20 and u+ 20. O B. Yes, because 90 is between u- 20 and + 20. OC. No, because 90 is greater than u + 20. D. Yes, because 90 is greater than u+ 20. O E. No, because 90 is less than u-20.
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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