SOLUTION: The time taken for a computer to boot up, X, follows a normal distribution with mean 30 seconds and standard deviation 5 seconds. What is the z-score for a boot up time of x = 3

Question 387872: The time taken for a computer to boot up, X, follows a normal distribution with mean 30 seconds and standard deviation 5 seconds.
What is the z-score for a boot up time of x = 30 seconds?
What is the z-score for a boot up time of x = 20 seconds?

Found 2 solutions by user_dude2008, robertb:
Answer by user_dude2008(1862) (Show Source): You can put this solution on YOUR website!
x=30 --> z = (x-mu)/sigma = (30-30)/5 = 0

x=20 --> z = (x-mu)/sigma = (20-30)/5 = -10/5 = -2
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
.
.
RELATED QUESTIONS
The random variable X denotes the time taken for a computer link to be made between the... (answered by jwh09)
The time taken for a computer link to be made between the terminal in an executive's... (answered by stanbon)
The time required for the credit card application process follows a normal distribution... (answered by Emsley)
Question 6 i) If X follows a Poisson distribution, written X ~ Pn(3), a) Write down... (answered by Boreal)
2. The time to run 100m for a group of children follows a normal distribution with mean... (answered by oscargut)
Swift Auto Service has taken advantage of some of the results you provided (HW #4)... (answered by stanbon)
normal distribution with a mean of 61 and standard deviation of 5, how to calculate the... (answered by stanbon)
Among the 30 largest U.S. cities, the mean one-way commute time to work is 25.8 minutes.... (answered by ikleyn)
The number of crimes committed daily has some unknown probability distribution with the... (answered by CPhill)