Suppose that the amount of time per day that American adults spend on their mobile devices is normally distributed with mean 229 minutes and standard deviation 57 minutes. About 68% of all American adults spend between ___________ and ___________ minutes on their mobile devices per day.

Suppose that the amount of time per day that American adults spend on their mobile devices is normally distributed with mean 229 minutes and standard deviation 57 minutes. About 68% of all American adults spend between _ and _ minutes on their mobile devices per day.

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 13PPS

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Question

Suppose that the amount of time per day that American adults spend on their mobile devices is normally distributed with mean 229 minutes and standard deviation 57 minutes.

About 68% of all American adults spend between ___________ and ___________ minutes on their mobile devices per day.

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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