The Test Scores of 40 Students Are Summarized in the Frequency

question 147

Multiple Choice

The test scores of 40 students are summarized in the frequency distribution below. Find the standard deviation.
$\begin{array}{r|c}\text { Score } & \text { Students } \\\hline 50 \text {-under } 60 & 8 \\60 \text {-under } 70 & 15 \\70 \text {-under } 80 & 6 \\80 \text {-under } 90 & 5 \\90 \text {-under } 100 & 6\end{array}$

• A)\(13.5\)
• B) \(12.2\)
• C) \(14.2\)
• D) \(12.8\)

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Definitions:

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The practices and activities undertaken to preserve or improve health, including exercise, balanced nutrition, and regular medical check-ups.

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The prioritization of career-related goals and activities, often involving specific vocational planning and development strategies.

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A stage in Erik Erikson's theory of psychosocial development where middle-aged adults have a desire to create or nurture things that will outlast them, contributing to the betterment of society.