In order to determine the average weight of carry-on luggage by passengers in airplanes, a sample of 16 pieces of carry- on luggage was weighed. The average weight was 22 pounds. Assume that we know the standard deviation of the population to be 5 pounds. Also, assume the population is normally distributed. Determine an 80% confidence interval estimate for the population mean weight of the cary-on a. luggage. b. Determine a 95% confidence interval estimate for the population mean weight of the carry-on luggage.

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Q: Hello can you show me the work for part A?

A: As you instructed we can solve part a as below

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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.