If X, the Time (In Minutes)to Complete an Oil Change $\le$

question 66

Multiple Choice

If x, the time (in minutes) to complete an oil change job at certain auto service station, is uniformly distributed over the interval 20 to 30, inclusively (20 $\le$ x $\le$ 30) , then the standard deviation of this distribution is __________________.

• A)unknown
• B)8.33
• C)0.833
• D)2.89
• E)1.89

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Definitions:

Academic Path

The sequence of courses and experiences through which a student progresses in their education.

Career Path

A series of occupations and roles held over a person's working life, reflecting their professional growth and development.

Refocus Purpose

The act of realigning or adjusting one’s goals or objectives to regain clarity and direction.

Time Manager

A person or tool that organizes and plans how to divide one's time between specific activities efficiently.