Use the Empirical Rule to Describe Data That Are Bell $0.1585$

question 149

Multiple Choice

Use the Empirical Rule to Describe Data That Are Bell Shaped
-At a tennis tournament a statistician keeps track of every serve. The statistician reported that the mean serve speed of a particular player was 103 miles per hour (mph) and the standard deviation of the serve speeds was 9 mph. Assume that the statistician also gave us the information that the distribution of the serve speeds was bell shaped. What proportion of the player s serves are expected to be between 112 mph and 130 mph

• A) \(0.1585\)
• B) \(0.317\)
• C) \(0.997\)
• D) \(0.68\)

---

Definitions:

Upward Direction

Movement or orientation towards a higher point or position.

Cell Membrane

The semipermeable membrane surrounding the cytoplasm of a cell, regulating the passage of substances in and out.

Proton

A subatomic particle found in the nucleus of an atom, carrying a positive electric charge.

Chemical Unit

A measurement or quantity of a chemical substance that is considered a standard or basic amount for scientific experiments and calculations.