Question

6. Suppose that speeds of vehicles on a particular stretch of roadway have mean 36.6 mph...

6. Suppose that speeds of vehicles on a particular stretch of roadway have mean 36.6 mph and standard deviation 1.7 mph. Find the probability that mean speed of 36 randomly selected vehicles is between 35 and 40.

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

Homework Answers

Answer #1

6

This is a normal distribution question with


P(35.0 < x < 40.0)=?

This implies that


PS: you have to refer z score table to find the final probabilities.
Please hit thumbs up if the answer helped you

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
Suppose speeds of vehicles on a particular stretch of roadway are normally distributed with a mean...
Suppose speeds of vehicles on a particular stretch of roadway are normally distributed with a mean of 36, 6mph and a standard deviation of 1.7 mph, what is the probability that out of 3 vehicles a randomly selected vehicle uses a speed of between 35mph and 40mph,
( PLEASE TYPE THE STEPS IF THAT'S POSSIBLE ) Suppose vehicle speeds at a highway location...
( PLEASE TYPE THE STEPS IF THAT'S POSSIBLE ) Suppose vehicle speeds at a highway location have a normal distribution with mean of 65 mph and standard deviation of 5 mph. What is the probability that a randomly selected vehicle speed is greater than 73 mph? Calculate the 60th percentile of the vehicle speed? Using the same standard deviation 5 mph, find the mean speed of all vehicles if the probability that the speed is greater than 73 mph is...
Chief Grady wants to know whether the mean speed of vehicles on a particular stretch of...
Chief Grady wants to know whether the mean speed of vehicles on a particular stretch of Pat Bay Highway exceeds the posted speed limit of 90 km per hour. He has a sample of 35 car speeds with a mean speed of 93 km per hour and a sample standard deviation of 4 km per hour. Chief Grady wishes to estimate the true mean speed of all vehicles passing this stretch of Pat Bay Highway using a 95% confidence interval....
use the empirical rule the main speed of a sample of vehicles along a stretch of...
use the empirical rule the main speed of a sample of vehicles along a stretch of highway is 63 mph with a standard deviation of 5 mph estimate the percent of vehicles his speeds are between 53 mph and 73 mph. (assume the data set has a bell shaped distribution) approximately ____% of vehicles travel between 53 mph and 73 mph
A traffic study conducted on an interstate highway shows that vehicle speeds (in mph) are normally...
A traffic study conducted on an interstate highway shows that vehicle speeds (in mph) are normally distributed with a mean of 61.3 and a standard deviation of 3.3.     a) Sketch the distribution of vehicle speeds. Show 3 steps of standard deviation above and below the mean.     b) If a vehicle is randomly checked, what is the probability that its speed is greater than 70? Include a sketch.     c) If 5 vehicles are randomly sampled, what is the...
A traffic study conducted on an interstate highway shows that vehicle speeds (in mph) are normally...
A traffic study conducted on an interstate highway shows that vehicle speeds (in mph) are normally distributed with a mean of 61.3 and a standard deviation of 3.3.     a) Sketch the distribution of vehicle speeds. Show 3 steps of standard deviation above and below the mean.     b) If a vehicle is randomly checked, what is the probability that its speed is greater than 70? Include a sketch.     c) If 5 vehicles are randomly sampled, what is the...
The city planners wanted to conduct a study of the speeds of vehicles being driven on...
The city planners wanted to conduct a study of the speeds of vehicles being driven on a certain road. They tracked the speeds of 23 randomly selected vehicles and found that the mean speed was 31 mph and standard deviation was 4.25 mph. a) Determine a 90% confidence interval for the mean speed of all vehicles being driven on that road. Explain the underlying assumptions and the meaning of this confidence interval. b) If the planners wanted to determine mean...
Assume the speed of vehicles along an open stretch of a certain highway in Texas that...
Assume the speed of vehicles along an open stretch of a certain highway in Texas that is not heavily traveled has an approximately Normal distribution with a mean of 71 mph and a standard deviation of 3.125 mph. The current posted speed limit is 65 mph. What is the proportion of vehicles going above the current posted speed limit? What proportion of the vehicles would be going less than 50 mph? What proportion of the vehicles would be going between...
1. A group of Western Carolina University students collected data on the speed of vehicles traveling...
1. A group of Western Carolina University students collected data on the speed of vehicles traveling through a construction zone in Cullowhee where the posted (construction) speed limit was 25 mph. The recorded speeds for 11 randomly selected vehicles are given below: 26 24 26 28 32 31 36 23 29 37 36 For this problem, you may round the mean to 30 and the sample standard deviation to 5. You may assume that it is appropriate to use the...
Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of...
Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 67 miles per​ hour, with a standard deviation of 3miles per hour. Estimate the percent of vehicles whose speeds are between 64miles per hour and 70miles per hour.​ (Assume the data set has a​ bell-shaped distribution.)
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT