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Assume the number of apps is normally distributed with mean  89 and standard deviation 30 . Part: 0 / 2 0 of 2 Parts Complete   Part 1 of 2     (a) What proportion of phones have fewer than  111  apps? Round the answer to four decimal places. The proportion of phones that have fewer than  111

Assume the number of apps is normally distributed with mean  89 and standard deviation 30 . Part: 0 / 2 0 of 2 Parts Complete   Part 1 of 2     (a) What proportion of phones have fewer than  111  apps? Round the answer to four decimal places. The proportion of phones that have fewer than  111

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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How many apps? According to a website, the mean number of apps on a smartphone in the United States is 
89. Assume the number of apps is normally distributed with mean 
89 and standard deviation 30
.
Part: 0 / 2
0 of 2 Parts Complete
 
Part 1 of 2
 
 

(a) What proportion of phones have fewer than 

111

 apps? Round the answer to four decimal places.

The proportion of phones that have fewer than 
111
 apps is 
 
.
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Follow-up Question

 

b) Find the 

55th

 percentile of the number of apps. Round the answer to two decimal places.

The 
55th
 percentile of the number of apps is 
 
.
 
 
 
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