The Sample Variance and Standard Deviation Can Be Calculated Using $\sum { x }$

question 146

True/False

The sample variance and standard deviation can be calculated using only the sum of the data, $\sum { x }$ , and the sample size, n.

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Definitions:

Precognition

The purported ability to foresee or have knowledge of future events before they occur.

Clairvoyance

The purported power to gather data about an object, a person, a location, or a physical happening through the use of extrasensory perception, bypassing traditional sensory channels.

Telepathy

The supposed communication of thoughts or ideas by means other than the known senses.

Psychokinesis

The purported skill to shift items solely through mental concentration.