Question

3. The mean time taken to assemble a car in a certain plant is a random...

3. The mean time taken to assemble a car in a certain plant is a random variable having a normal distribution of 20 hours and a standard deviation of 2 hours.

a. Find the probability that a randomly selected a car can be assembled less than 19.5 hours.                                         
b. Find the probability that a randomly selected a car can be assembled between 20 and
22 hours.                            
c. Find the probability that a randomly selected a car can be assembled more than 21 hours.                                             
d. Find the probability that a randomly selected a car can be assembled between 18 and
22 hours.                           

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
The time taken to assemble a car in a certain plant is a normal random variable...
The time taken to assemble a car in a certain plant is a normal random variable having a mean of 20hours. If 6.3% of the cars assembled take longer than 25 hours to assemble, what is the standard deviation of assembly time?
The time it takes to assemble a car in a certain factory is normally distributed with...
The time it takes to assemble a car in a certain factory is normally distributed with a mean of 20 hours and a standard deviation of 2 hours. [Probability = percent] What is the probability that a car can be assembled in less than 19.4 hours? What is the probability that a car can be assembled between 20 and 22 hours? What is the probability that it will take more than 23 hours to assemble a car? What is the...
The time it takes to assemble a car in a certain factory is normally distributed with...
The time it takes to assemble a car in a certain factory is normally distributed with a mean of 20 hours and a standard deviation of 2 hours. [Probability = percent] (a) What is the probability that a car can be assembled in less than 19.4 hours? (b) What is the probability that a car can be assembled between 20 and 22 hours? (c) What is the probability that it will take more than 23 hours to assemble a car?...
The time taken to assemble a car at the OKCar plant is a randomly distributed with...
The time taken to assemble a car at the OKCar plant is a randomly distributed with a mean of 20.1 hours and a standard deviation of 2.3 hours. You pick a random sample of 30 cars. What is the probability that the mean number of hours that it took to assemble these 30 cars is between 19.8 and 20.8 hours?
The time required to assemble a piece of machinery is a random variable having a normal...
The time required to assemble a piece of machinery is a random variable having a normal distribution with mean μ=14.8 minutes and standard deviation σ = 1.5 minutes. Inspectors at the plant will use the time required to assemble a piece of machinery to detect potential problems with the machine. a. What percent of assembly times exceed 16.25 minutes? b. Inspectors will use the 95th percentile of the assembly time distribution as an indicator (if it takes more than that...
For a certain type of computers, the length of time between charges of the battery is...
For a certain type of computers, the length of time between charges of the battery is normally distributed with a mean of 42 hours and a standard deviation of 18 hours. a. If 20 computers are randomly selected, what is the probability that the mean charging time of their batteries is more than 45 hours? b. If 38 computers are randomly selected, what is the probability that the mean charging time of their batteries is between 37 and 40 hours?...
Suppose that the random sample is taken from a normal distribution N(8,9), and the random sample...
Suppose that the random sample is taken from a normal distribution N(8,9), and the random sample is between 1 to 25. Find the distribution of the sample mean. Find probability that the sample mean is less than or equal to 8.8 and the sample variance is less than or equal to 12.45, where the probabilities are independent. Find probability that the sample mean is less than 8+(.5829)S, where S is the sample standard deviation.
A certain population has an income distribution given by a normal random variable whose mean is...
A certain population has an income distribution given by a normal random variable whose mean is $35000 and whose standard deviation is $7500. A. What is the probability that a randomly selected person has an income of at least $35000?
Problem 7 Suppose you have a random variable X that represents the lifetime of a certain...
Problem 7 Suppose you have a random variable X that represents the lifetime of a certain brand of light bulbs. Assume that the lifetime of light bulbs are approximately normally distributed with mean 1400 and standard deviation 200 (in other words X ~ N(1400, 2002)). Answer the following using the standard normal distribution table: Approximate the probability of a light bulb lasting less than 1250 hours. Approximate the probability that a light bulb lasts between 1360 to 1460 hours. Approximate...
1) The weights of suitcases at an airport are normally distributed with a mean of 17kg...
1) The weights of suitcases at an airport are normally distributed with a mean of 17kg and standard deviation 3.4kg. a. Find the probability that a randomly selected suitcase weighs between 10kg and 15kg. b. Find the probability that a randomly selected suitcase weighs at least 20 kg. c. Find the probability that a randomly selected suitcase weighs less than 12 kg. 2) On New Year's Eve, the probability of a person having a car accident is 0.29. The probability...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT