Question

The time it takes students to complete a quiz is Normally distributed with a mean of...

The time it takes students to complete a quiz is Normally distributed with a mean of 45 minutes and a standard deviation of 4 minutes.  

a)What percent of all students take longer than 50 minutes to complete the quiz? Round your answer to the nearest whole percent. Don't write the percent symbol in your answer.

b)If you take a sample of 30 students, what is the probability that the average amount of time needed to complete the quiz for this group is more than 50 minutes? Write your answer as a

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
The time needed to complete a final quiz in a particular college course is normally distributed...
The time needed to complete a final quiz in a particular college course is normally distributed with a mean of 77 minutes and a standard deviation of 12 minutes. Answer the following questions. a. What is the probability of completing the quiz in one hour or less (to 4 decimals)? b. What is the probability that a student will complete the quiz in more than 60 minutes but less than 75 minutes (to 4 decimals)? c. Assume that the class...
A) The amount of time it takes students to complete a quiz is uniformly distributed between...
A) The amount of time it takes students to complete a quiz is uniformly distributed between 35 to 65 minutes. One student is selected at random. Find the following events: a. The probability density function (pdf) of amount of time taken for the quiz. b. The probability that the student requires more than 50 minutes to complete the quiz.(1 mark) c. The probability that completed quiz time is between 45 and 55 minutes. (1 mark) d. The probability that the...
The average time to complete the quiz for all students in the class is uniformly distributed...
The average time to complete the quiz for all students in the class is uniformly distributed between 90 minutes and 150 minutes. Define x Write the notation for the distribution that defines x. x~ Find the mean and interpret the results Find the probability that a student finishes in less than 95 minutes Find the probability that a student takes at least 135 minutes to finish the quiz
The average time it takes a group of students to complete a certain assignment is 36...
The average time it takes a group of students to complete a certain assignment is 36 minutes. The standard deviation is 4 minutes. Assume the variable is normally distributed. Now find the probability that if a group of 9 randomly selected students complete the assignment, the mean time it takes the group will complete the assignment in less than 33 minutes. Include drawings in your work. Use Traditional Method for hypothesis testing unless specified otherwise. Use correct rounding rule for...
The time needed to complete a final examination in a particular college course is normally distributed...
The time needed to complete a final examination in a particular college course is normally distributed with a mean of 77 minutes and a standard deviation of 12 minutes. Answer the following questions. a. what is the probability of completing the exam in one hour or less (to 4 decimals) b. what is the probability that a student will complete the exam in more than 60 minutes but less than 75 minutes (to 4 decimals) c. assume that the class...
he time needed to complete a final examination in a particular college course is normally distributed...
he time needed to complete a final examination in a particular college course is normally distributed with a mean of 80 minutes and a standard deviation of 10 minutes. Answer the following questions. (a) What is the probability of completing the exam in one hour or less? (Round your answer to four decimal places.) (b) What is the probability that a student will complete the exam in more than 60 minutes but less than 65 minutes? (Round your answer to...
The time needed to complete a final examination in a particular college course is normally distributed...
The time needed to complete a final examination in a particular college course is normally distributed with a mean of 80 minutes and a standard deviation of 10 minutes. Answer the following questions. (a) What is the probability of completing the exam in one hour or less? (Round your answer to four decimal places.) (b) What is the probability that a student will complete the exam in more than 60 minutes but less than 75 minutes? (Round your answer to...
4. The time that it takes a person to complete a survey is normally distributed with...
4. The time that it takes a person to complete a survey is normally distributed with a mean of 18 minutes and a standard deviation of 3.5 minutes. (a)  Find the 45’th percentile.
7) The time it takes college freshman to complete the Mason Basic Reasoning Test is normally...
7) The time it takes college freshman to complete the Mason Basic Reasoning Test is normally distributed with a mean of 24.6 minutes with a standard deviation of 5.8 minutes. a) What is the probability that a college freshman will take more than 35 minutes to complete the exam? b) What is the probability that a student will take less than 20 minutes to complete the exam?
9.   Suppose that the time that it takes a student to complete this test is normally...
9.   Suppose that the time that it takes a student to complete this test is normally distributed. The mean time is 58 minutes with a standard deviation of 11 minutes. Use the empirical rule to solve the following questions. Answers using the normal calculator and not the empirical rule will be marked as wrong. a.   What is the probability that a person will take between 47 and 58 minutes? (Draw a picture to show your answer.) b.   What is the...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT