The Amount of Time That a Student Brushes His Teeth

question 38

Short Answer

The amount of time that a student brushes his teeth has an approximate normal distribution with a
mean of 1.8 minutes and a standard deviation of 0.3 minutes. What is the probability that the student
brushes his teeth for less than 1.5 minutes? Give your answer as a percentage.

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Definitions:

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Features in software applications that allow users to add various elements (e.g., text, images, tables) into a document or file.

Linked Pictures

Images inserted into a document that maintain a reference to their original file, enabling updates if the source image changes.

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The set of rules that defines the structure and composition of phrases and sentences in a programming language or markup language.

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A feature in spreadsheet software that allows users to extend a series of values, formulas, or data by dragging a small square at the corner of the selected cell(s).