Tom's commuting time from his residence in Carmel to the IUPUI campus has a normal distribution.  The standard deviation of the commuting time is 6 minutes. 18 What is the probability that the commuting time would exceed 55 minutes?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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Tom's commuting time from his residence in Carmel to the IUPUI campus has a normal distribution.  The standard deviation of the commuting time is 6 minutes.
18 What is the probability that the commuting time would exceed 55 minutes?
a 0.0950            
b 0.0678            
c 0.0484            
d 0.0346
Expert Solution
Step 1-Writing given data

Given that 

The Tom's commuting time from his residence in Carmel to the IUPUI campus has a normal distribution.

The standard deviation (σ) = 6 minutes

 We know that 

From problem number 17 that mean commuting time is 46 minutes.

(μ) = 46 minutes

 

We know that 

Z = (x-μ)σ

 

 

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