SOLUTION: Question It has been found that the times taken by people to complete the income tax form follows a Normal distribution with a mean of 100 minutes and a standard deviation of 20 m

Question 1058438: Question
It has been found that the times taken by people to complete the income tax form follows a Normal distribution with a mean of 100 minutes and a standard deviation of 20 minutes.
Calculate the following probabilities:
1. A person takes 110 minutes or more to complete the form
2. A person takes between 100 and 125 minutes to complete the form
3. A person takes between 75 and 115 minutes to complete the form
4. A person takes less than 120 minutes to complete the form
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Calculate a z score for each case. I'll do one you do the others.
1.

2.
3.
4.

RELATED QUESTIONS
Question A company claims that 80% of its trainees are promoted within the first year.... (answered by Boreal)

The average income tax refund for the 2009 tax year was $2860 Assume the refund... (answered by Boreal)

Question 6 i) If X follows a Poisson distribution, written X ~ Pn(3), a) Write down... (answered by Boreal)

1. A recent survey found that 80% of all adults over 50 wear glasses for driving. You... (answered by ewatrrr)

A study on the delivery time of mail between two locations has found that the data... (answered by Boreal)

Hello, I have the following problem. Marks obtained by a number of students follows... (answered by ewatrrr)

I am not able to figure this one out, the question is as follows: What number would... (answered by robertb)

The elevator installed in a building can carry up to 10 people or a maximum weight of 800 (answered by Boreal)