The Lengths of Long Distance Phone Calls Placed on a Cell

question 20

Multiple Choice

The lengths of long distance phone calls placed on a cell phone can be described by a Normal model with a mean of 7 minutes and a standard deviation of 2 minutes.If one call is randomly selected from wireless phone company records,what is the probability that it will have lasted more than 11 minutes?

• A)0.0977
• B)0.23
• C)0.977
• D)0.023
• E)0.98

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Definitions:

Primary Spermatocyte

A male germ cell that undergoes meiosis to form spermatozoa, in the process of spermatogenesis.

Sertoli Cell

A type of somatic cell found within the seminiferous tubules of the testis that supports and nourishes developing sperm cells.

Zona Pellucida

The zona pellucida is a glycoprotein layer surrounding the plasma membrane of an oocyte or early-stage embryo, playing a crucial role in fertilization and preventing polyspermy.

Effaced

In medical terms, often relates to the thinning and stretching of the cervix in preparation for childbirth; in a general context, it can mean erased or made less clear.