Question

A phone manufacturer wants to compete in the touch screen phone market. He understands that the...

A phone manufacturer wants to compete in the touch screen phone market. He understands that the lead product has a battery life of just 6 hours. The manufacturer claims that while the new touch phone is more expensive, its battery life is more than twice as long as that of the leading product. In order to test the claim, a researcher samples 55 units of the new phone and finds that the sample battery life averages 12.2 hours with a sample standard deviation of 1.5 hours. A. Compute the value of the test statistic. B. Calculate the critical value to test the phone manufacturer’s claim at α = 0.01.

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

Homework Answers

Answer #1

from above:

A) value of the test statistic =0.989

B) critical value =2.397

as test statisitic is not higher than critical value we fail to reject null hypothesis

the sample data does not provide evidence to support manufacturer’s claim

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 phone manufacturer wants to compete in the touch screen phone market. Management understands that the...
A phone manufacturer wants to compete in the touch screen phone market. Management understands that the leading product has a less than desirable battery life. They aim to compete with a new touch screen phone that is guaranteed to have a battery life more than two hours longer than the leading product. A recent sample of 139 units of the leading product provides a mean battery life of 5 hours and 31 minutes with a standard deviation of 32 minutes....
40. A cell phone manufacturer claims that its phone will last for more than 8 hours...
40. A cell phone manufacturer claims that its phone will last for more than 8 hours of continuous talk time when the battery is fully charged. To test this claim at a​ 10% level of​ significance, a random sample of 18 phones were selected. The results showed a sample mean of 8.2 hours and a sample standard deviation of 0.4 hour. Based on the data and hypothesis​ test, can you dispute the cell phone​ manufacturer’s claim? A. YES B. NO...
A cell phone manufacturer claims that the batteries in its latest model provide 20 hours of...
A cell phone manufacturer claims that the batteries in its latest model provide 20 hours of continuous use. In order to verify this claim, and independent testing firm checks the battery life of 100 phones. They find that the batteries in these 100 phones last an average of 19 hours with a standard deviation of 5 hours. Conduct an appropriate hypothesis test to check whether the results from this sample provide sufficient evidence that the true mean battery life is...
Question 2: An office building in New York uses thousands of fluorescent light bulb each year....
Question 2: An office building in New York uses thousands of fluorescent light bulb each year. The brand of bulb it currently uses has a mean life of 900 hours. A manufacturer claims that its new brand of bulbs, which cost the same as the brand the office building currently uses, has a mean life of more than 900 hours. The university has decided to purchase the new brand if, when tested, the test evidence supports the manufacturer’s claim at...
1. Do you check your phone or use technology right before you go to bed? If...
1. Do you check your phone or use technology right before you go to bed? If so, chances are that you are not alone. A recent news report claims that 60% of adults use some kind of technology right before they go to bed at night. Believing that this claimed value is too low, a researcher surveys a random sample of 200 adults and finds that 71% use some kind of right before they go to bed. If a hypothesis...
Sign In INNOVATION Deep Change: How Operational Innovation Can Transform Your Company by Michael Hammer From...
Sign In INNOVATION Deep Change: How Operational Innovation Can Transform Your Company by Michael Hammer From the April 2004 Issue Save Share 8.95 In 1991, Progressive Insurance, an automobile insurer based in Mayfield Village, Ohio, had approximately $1.3 billion in sales. By 2002, that figure had grown to $9.5 billion. What fashionable strategies did Progressive employ to achieve sevenfold growth in just over a decade? Was it positioned in a high-growth industry? Hardly. Auto insurance is a mature, 100-year-old industry...
Using the model proposed by Lafley and Charan, analyze how Apigee was able to drive innovation....
Using the model proposed by Lafley and Charan, analyze how Apigee was able to drive innovation. case:    W17400 APIGEE: PEOPLE MANAGEMENT PRACTICES AND THE CHALLENGE OF GROWTH Ranjeet Nambudiri, S. Ramnarayan, and Catherine Xavier wrote this case solely to provide material for class discussion. The authors do not intend to illustrate either effective or ineffective handling of a managerial situation. The authors may have disguised certain names and other identifying information to protect confidentiality. This publication may not be...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT