At the US Open Tennis Championship a Statistician Keeps Track of Every

question 48

Multiple Choice

At the U.S. Open Tennis Championship a statistician keeps track of every serve that a player hits during the tournament. The statistician reported that the mean serve speed was 100 miles per hour
(mph) and the standard deviation of the serve speeds was 15 mph. If nothing is known about the
Shape of the distribution, what percentage of the playerʹs serve speeds are less than 70 mph?

• A)approximately 2.5%
• B)at most 12.5%
• C)approximately 5%
• D)at most 11%
• E)at most 25%

---

Definitions:

Teenage Pregnancy

Occurs when a girl becomes pregnant during her adolescent years, often resulting in a range of socio-economic and health challenges for both mother and child.

Premarital Pregnancy

A term referring to pregnancy that occurs before marriage.

Economic Well-Being

A condition that includes the financial security, quality of life, and ability of individuals or communities to meet their basic needs and enjoy a certain standard of living.

Emotional Health

The aspect of health that pertains to managing and understanding emotions, maintaining emotional equilibrium, and recognizing emotional responses.