(68-95-99.7 rule) The time to complete a standardized exam is approximately normal with a mean of 65 minute nd a standard deviation of 5 minutes. Using the 68-95-99.7 rule to answer these questions. ) About what percent of students will complete the exam in under an hour? ) What percent of students will complete the exam in between 50 and 80 minutes? ) In what range do the middle 95% of all students lie?

(68-95-99.7 rule) The time to complete a standardized exam is approximately normal with a mean of 65 minute nd a standard deviation of 5 minutes. Using the 68-95-99.7 rule to answer these questions. ) About what percent of students will complete the exam in under an hour? ) What percent of students will complete the exam in between 50 and 80 minutes? ) In what range do the middle 95% of all students lie?

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Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.3: Measures Of Spread

Problem 26PFA

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(68-95-99.7 rule) The time to complete a standardized exam is approximately normal with a mean of 65 minute
nd a standard deviation of 5 minutes. Using the 68-95-99.7 rule to answer these questions.
) About what percent of students will complete the exam in under an hour?
) What percent of students will complete the exam in between 50 and 80 minutes?
) In what range do the middle 95% of all students lie?

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