In a Study Performed by the Statistics Classes at Jefferson

question 38

Essay

In a study performed by the statistics classes at Jefferson High School, city parking
spaces were examined for compliance with the requirement to put money in the
parking meters. Overall, the students found that 80% of metered parking places had
meters that were not expired, and 20% had meters that were expired. If the traffic
officer in charge of ticketing checks meters at random, what is the probability he or
she will find an expired meter before the 3rd one checked?

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Definitions:

Glial Cells

Non-neuronal cells in the nervous system that provide support and protection for neurons.

Synapses

The junctions between neurons through which signals are transmitted; these can be chemical or electrical in nature.

Blood Vessels

Tubular structures carrying blood through the tissues and organs; a vital component of the circulatory system.

Pincer Grasp

The coordination of the index finger and thumb to hold an object, an important milestone in the fine motor development of infants.