Find the Standard Deviation of the Data Summarized in the Given

question 50

Multiple Choice

Find the standard deviation of the data summarized in the given frequency distribution.
-The test scores of 40 students are summarized in the frequency distribution below. Find the standard deviation. $$\begin{array}{l}\text { Score Students }\\\begin{array} { r r } 50 - 59 & 5 \\60 - 69 & 7 \\70 - 79 & 9 \\80 - 89 & 10 \\90 - 99 & 9\end{array}\end{array}$$

• A) 12.7
• B) 13.4
• C) 14.1
• D) 12.1

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Definitions:

Self-serving Bias

The tendency to attribute positive events to one's own character but attribute negative events to external factors.

Unconditional Regard

A concept in psychology that refers to accepting and supporting someone regardless of what they say or do, typically used in the context of therapeutic relationships.

Reciprocal Determinism

A core concept of social cognitive theory that suggests individual behavior, environmental factors, and personal cognitive factors operate as interlocking determinants influencing each other.

ADHD

Attention Deficit Hyperactivity Disorder, a neurodevelopmental disorder characterized by difficulties in maintaining attention, hyperactivity, and impulsiveness.