The results of a national survey showed that on average, adults sleep 7.3 hours per night. Suppose that the standard deviation is 2 hours and that the number of hours of sleep follows a bell-shaped distribution. If needed, round your answers to two decimal digits. If your answer is negative use "minus sig (a) Use the empirical rule to calculate the percentage of individuals who sleep between 3.3 and 11.3 hours per day. Enter your answer as a percentage. % (b) What is the z-value for an adult who sleeps 8 hours per night? (e) What is the z-value for an adult who sleeps 6 hours per night?
The results of a national survey showed that on average, adults sleep 7.3 hours per night. Suppose that the standard deviation is 2 hours and that the number of hours of sleep follows a bell-shaped distribution. If needed, round your answers to two decimal digits. If your answer is negative use "minus sig (a) Use the empirical rule to calculate the percentage of individuals who sleep between 3.3 and 11.3 hours per day. Enter your answer as a percentage. % (b) What is the z-value for an adult who sleeps 8 hours per night? (e) What is the z-value for an adult who sleeps 6 hours per night?
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 14PPS
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