Question

A trucking company would like to compare two different routes for efficiency. Truckers are randomly assigned...

A trucking company would like to compare two different routes for efficiency. Truckers are randomly assigned to two different routes. Twenty truckers following Route A report an average of 42 ​minutes, with a standard deviation of 4 minutes. Twenty truckers following Route B report an average of 47 minutes with a standard deviation of 3 minutes. Histograms of travel times for the routes are roughly symmetric and show no outliers.

​a) Find a​ 95% confidence interval for the difference in the commuting time for the two routes.

​b) Does the result in part​ (a) provide sufficient evidence to conclude that the company will save time by always driving one of the​ routes? Explain.

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
A man who moves to a new city sees that there are two routes he could...
A man who moves to a new city sees that there are two routes he could take to work. A neighbor who has lived there a long time tells him Route A will average 5 minutes faster than Route B. The man decides to experiment. Each day he flips a coin to determine which way to​ go, driving each route 10 days. He finds that Route A takes an average of 42 ​minutes, with standard deviation 11 minutes and Route...
Two men, A and B, who usually commute to work together decide to conduct an experiment...
Two men, A and B, who usually commute to work together decide to conduct an experiment to see whether one route is faster than the other. The men feel that their driving habits are approximately the same, so each morning for two weeks one driver is assigned to route I and the other to route II. The times, recorded to the nearest minute, are shown in the following table. Using this data, find the 90% confidence interval for the true...
Two men, A and B, who usually commute to work together decide to conduct an experiment...
Two men, A and B, who usually commute to work together decide to conduct an experiment to see whether one route is faster than the other. The men feel that their driving habits are approximately the same, so each morning for two weeks one driver is assigned to route I and the other to route II. The times, recorded to the nearest minute, are shown in the following table. Using this data, find the 98% confidence interval for the true...
Morgan wants to test the speed for two different routes she can take to ride her...
Morgan wants to test the speed for two different routes she can take to ride her bicycle home from work. Route A involves riding her bicycle on a busy road, and Route B involves riding her bicycle along a scenic trail. Morgan collects some initial data, given in the table below: Route A Route B ?⎯⎯⎯=10 minutes ?⎯⎯⎯=7 minutes ?=4 minutes ?=5 minutes ?=7 ?=6 Based on Morgan's initial data, she conducts a hypothesis test to determine whether there is...
The Acme Company manufactures large capacity Flash drives using two different manufacturing processes. The company is...
The Acme Company manufactures large capacity Flash drives using two different manufacturing processes. The company is interested in determining if there is a significant difference in the average manufacturing time of the two processes. For Process #1, a sample of 28 items shows a sample mean of 9 minutes and a sample standard deviation of 3.5 minutes. For Process #2, a sample of 23 items shows a sample mean of 13 minutes and a sample standard deviation of 4.5 minutes....
The Acme Company manufactures large capacity Flash drives using two different manufacturing processes. The company is...
The Acme Company manufactures large capacity Flash drives using two different manufacturing processes. The company is interested in determining if there is a significant difference in the average manufacturing time of the two processes. For Process #1, a sample of 28 items shows a sample mean of 9 minutes and a sample standard deviation of 3.5 minutes. For Process #2, a sample of 23 items shows a sample mean of 13 minutes and a sample standard deviation of 4.5 minutes....
Question 1: The director of a green energy company is interested in comparing two different methods...
Question 1: The director of a green energy company is interested in comparing two different methods of installing solar light panels. An experiment is conducted with 31 technicians using the old method and the other 46 technicians using the new method. For the 31 technicians using the old method, the average time was 525 minutes with 47.7 standard deviation. For the 46 technicians using the new method, the average time was 520 minutes with 48.2 standard deviation. Conduct an analysis...
The manager of a door-making company would like to estimate the amount of time it takes...
The manager of a door-making company would like to estimate the amount of time it takes for a piece of wood to be moved, cut, and packaged at two different plants. At Plant A, the manager observed 21 pieces that processed with an average time of 14.2 minutes and standard deviation of 2.6 minutes. At the second plant, the manager observed 19 pieces with an average time of 13.1 minutes with a standard deviation of 1.9 minutes. a. Test whether...
The director of a green energy company is interested in comparing two different methods of installing...
The director of a green energy company is interested in comparing two different methods of installing solar light panels. An experiment is conducted with 30 technicians using the old method and the other 45 technicians using the new method. For the 30 technicians using the old method, the average time was 643 minutes with 57.9 standard deviation. For the 45 technicians using the new method, the average time was 499 minutes with 93.6 standard deviation. Conduct an analysis to determine...
What is the chance a randomly selected employee would get a non-zero bonus amount? What is...
What is the chance a randomly selected employee would get a non-zero bonus amount? What is the chance a randomly selected employee would get at least $6000? What is the expected bonus value of the bonus amounts? What are the variance and standard deviation of the bonus amount? Binomial Suppose according to past data for a small boutique, about 30% of the customers who walk into the store purchase at least one item. Today 10 individual customers walked into the...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT