Question

the time to complete an exam is approximately normal with a mean of 50 minutes and...

the time to complete an exam is approximately normal with a mean of 50 minutes and a standard deviation of 4 minutes. the bell curve below represent the distributions for testing times. the scale on the horizontal axis is equal to the standard deviation. Fill in the indicated boxes.

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 to complete a standardized exam is approximately Normal with a mean of 70 minutes...
The time to complete a standardized exam is approximately Normal with a mean of 70 minutes and a standard deviation of 10 minutes. (z (X-μ)/σ) μ= σ= A) If students are given 85 minutes to complete the exam, what probability that students will not finish? B) What percent of students will complete the exam between 63 minutes and 80 minutes?
Let XX represent the full height of a certain species of tree. Assume that XX has...
Let XX represent the full height of a certain species of tree. Assume that XX has a normal probability distribution with mean 186.3 ft and standard deviation 75.6 ft. You intend to measure a random sample of n=233 treess. The bell curve below represents the distibution of these sample means. The scale on the horizontal axis is the standard error of the sampling distribution. Complete the indicated boxes, correct to two decimal places. What is the Standard Deviation? What is...
The time to complete a standardized exam is normally distributed with a mean of 55.8 minutes...
The time to complete a standardized exam is normally distributed with a mean of 55.8 minutes and a standard deviation of 9.3 minutes. The designers of the exam want to set a time limit where only 14% of the people taking the exam do not finish. What should this time limit be? Please explain where each number goes! I have to show full work!
Let X X represent the full length of a certain species of newt. Assume that X...
Let X X represent the full length of a certain species of newt. Assume that X has a normal probability distribution with mean 216.4 inches and standard deviation 5 inches. You intend to measure a random sample of n = 114 newts. The bell curve below represents the distribution of these sample means. The scale on the horizontal axis is the standard error of the sampling distribution. Complete the indicated boxes, with μ ¯ x  and σ ¯ x to three...
The amount of time you need to complete a mathematics placement test is approximately normal distribution...
The amount of time you need to complete a mathematics placement test is approximately normal distribution with a mean 45 minutes wiith a standard deviation six minutes. Find the probability of students will complete the test within 45 minutes it takes from me approximately normally distributed with a mean of 30 minutes to get to work and a standard division of 4 minutes what time should I leave home to make sure that I have a 95% chance of being...
The average length of time required to complete a college achievement test is approximately normal with...
The average length of time required to complete a college achievement test is approximately normal with a mean of 65 minutes and a standard deviation of 11 minutes. When should the test be terminated (in minutes) if you wish to allow sufficient time for 80% of the students to complete the test? (Round your answer to two decimal places.) ____________ min
The delivery time for a pizza company is approximately bell-shaped with a mean of 28.6 minutes...
The delivery time for a pizza company is approximately bell-shaped with a mean of 28.6 minutes with a standard deviation of 4.2 minutes. According to the Empirical Rule, what percent of deliveries should occur within 16 and 41.2 minutes?
a. Draw a normal curve on which the mean (90 minutes) and the standard deviation (7...
a. Draw a normal curve on which the mean (90 minutes) and the standard deviation (7 minutes) are correctly located. b. What percent of students used more than 90 minutes but less than 100 minutes to complete the exam? Show your work. c. 10% of students used more than how many minutes to complete the exam? Show your work
1- Assume the time to complete a task has a normal distribution with mean 20 min....
1- Assume the time to complete a task has a normal distribution with mean 20 min. and standard deviation 4 min. Find the proportion of times that are BETWEEN 15 and 25 minutes? Note: Enter X.XX AT LEAST ONE DIGIT BEFORE THE DECIMAL, TWO AFTER and round up. Thus, 7 is entered as 7.00, 3.5 is entered as 3.50, 0.3750 is entered as 0.38 2- Assume the time to complete a task has a normal distribution with mean 20 min....
The time spent by students working on this exam can be approximated by a normal random...
The time spent by students working on this exam can be approximated by a normal random variable with mean value μ = 60 minutes and standard deviation σ = 5 minutes. (a) What is the probability that a student finishes this exam in less than 50 minutes? (b) What is the probability that a student spends between 60 minutes and 70 minutes taking this exam?
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT