Charles Clayton Monitors the Daily Performance of His Investment Portfolio

question 50

Multiple Choice

Charles Clayton monitors the daily performance of his investment portfolio by recording a "+" or a "-" sign to indicate whether the portfolio's value increased or decreased from the previous day.His record for the last eighteen business days is "- + + - - - + - - + + + - + + + + -".The number of runs in this sample is _________.

• A)uncertain
• B)four
• C)five
• D)nine
• E)one

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Definitions:

Positron Emission Tomography

An imaging technique that detects positrons emitted by a radioactively labeled substance in the body, used to observe metabolic processes.

Voltage-Gated

Referring to ion channels that open or close in response to changes in electrical membrane potential.

Sodium

Sodium is a chemical element with the symbol Na and atomic number 11, a soft, silvery-white, highly reactive metal.

Potassium

A chemical element with symbol K, vital for plant growth and important in nerve function in animals.