# Math

The time needed to complete a final examination in a particular college course is normally distributed with a mean of 83 minutes and a standard deviation of 13 minutes. Answer the following questions.

What is the probability of completing the exam in one hour or less (to 4 decimals)?

What is the probability that a student will complete the exam in more than 60 minutes but less than 75 minutes (to 4 decimals)?

Assume that the class has 60 students and that the examination period is 90 minutes in length. How many students do you expect will be unable to complete the exam in the allotted time (to the nearest whole number)?

1. 👍 0
2. 👎 0
3. 👁 2,271
1. The best webpage for this kind of problem on the entire internet

Just enter you data

http://davidmlane.com/hyperstat/z_table.html

1. 👍 0
2. 👎 0
2. Need Help

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Math

The combined math and verbal scores for students taking a national standardized examination for college admission, is normally distributed with a mean of 620 and a standard deviation of 220. If a college requires a student to be

2. ### Statistic

At one college, GPA's are normally distributed with a mean of 2.7 and a standard deviation of 0.5. What percentage of students at the college have a GPA between 2.2 and 3.2?

3. ### statistics

The times taken to complete a statistics test by all students are normally distributed with a mean of 120 minutes and a standard deviation of 12 minutes. Find the probability that the mean time taken to complete this test by a

4. ### Statistics

Aldrich Ames is a convicted traitor who leaked American secrets to a foreign power. Yet Ames took routine lie detector tests and each time passed them. How can this be done? Recognizing control questions, employing unusual

1. ### statistics

The times taken to complete a statistics test by all students are normally distributed with a mean of 120 minutes and a standard deviation of 12 minutes. Find the probability that the mean time taken to complete this test by a

2. ### statistics

4. The scores on a university examination are normally distributed with a mean of 62 and a standard deviation of 11. If the bottom 5% of students will fail the examination, what is the lowest score, to the nearest whole number,

3. ### statistics

At one college, GPAs are normally distributed with a mean of 2.6 and a standard deviation of 0.6. What percentage of students at the college have a GPA between 2 and 3.2?

4. ### statistics

The grades on the final examination given in a large organic chemistry class are normally distributed with a mean of 72 and a standard deviation of 8. The instructor of this class wants to assign an “A” grade to the top 10% of

1. ### Statistic

Score on a certain nationwide college entrance examination follow a normal distribution with a mean of 500and a standard deviation of 100

2. ### Statistics

The average score for a business examination comprising 300 students is 54%. If the marks are normally distributed with a standard deviation of 8%, determine the number of students scores above 70%.

3. ### statistics

The time needed to complete a final examination in a particular college course is normally distributed with a mean of 79 minutes and a standard deviation of 8 minutes. Answer the following questions. Assume that the class has 60

4. ### statisitcs

The combined math and verbal scores for students taking a national standardized examination for college admission is normally distributed with a mean of 560 and a standard deviation of 180. If a college requires a student to be in