Question

A company that produces cell phone batteries claims their new battery last more than 30 hours....

A company that produces cell phone batteries claims their new battery last more than 30 hours. To investigate this claim a consumer advocacy group collected the following random sample for number hours that each battery worked: 50, 40, 35, 25, 60, 45, 30, 50, 30, 10. Is there a sufficient evidence to accept the company’s claims using 0.01 significance level?

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 company that produces cell phones claims its standard phone battery lasts longer on average than...
A company that produces cell phones claims its standard phone battery lasts longer on average than other batteries in the market. To support this​ claim, the company publishes an ad reporting the results of a recent experiment showing that under normal​ usage, their batteries last at least 35 hours. To investigate this​ claim, a consumer advocacy group asked the company for the raw​ data, which are shown to the right. Find a 95 ​% confidence interval and state your conclusion....
A battery company claims that its batteries last an average of 100 hours under normal use....
A battery company claims that its batteries last an average of 100 hours under normal use. After several complaints that the batteries do not last this long, an independent testing laboratory decided to test the company’s claim with a random sample of 42 batteries. The data from the 42 batteries appeared to be unimodal and symmetric with a mean 97 hours and a standard deviation of 12 hours. Is this evidence that the company’s claim is false and these batteries...
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 battery company claims that its batteries last an average of 100 hours under normal use....
A battery company claims that its batteries last an average of 100 hours under normal use. After several complaints that the batteries do not last this long, an independent testing laboratory decided to test the company’s claim with a random sample of 42 batteries. The data from the 42 batteries appeared to be unimodal and symmetric with a mean 97 hours and a standard deviation of 12 hours. Is this evidence that the company’s claim is false and these batteries...
A battery company produces typical consumer batteries and claims that their batteries last at least 100...
A battery company produces typical consumer batteries and claims that their batteries last at least 100 hours, on average. Your experience with their batteries has been somewhat different, so you decide to conduct a test to see if the company’s claim is true. You believe that the mean life is actually less than the 100 hours the company claims. You decide to collect data on the average battery life (in hours) of a random sample and obtain the following information:...
A cell phone manufacturer claims that, if properly charged, their phone batteries will operate for 48...
A cell phone manufacturer claims that, if properly charged, their phone batteries will operate for 48 hours. A study of 5000 batteries is undertaken and 15 stop operating in under 48 hours. Do these results support a claim that less than 0.2 percent of the company’s batteries will fail during the 48 hour period? Use a hypothesis test with ?=0.01. Be sure to explicitly state: The null and alternative hypotheses The test statistic equation and value Your conclusion
A battery company claims that its batteries last an average of 100 hours under normal use....
A battery company claims that its batteries last an average of 100 hours under normal use. After several complaints that the batteries do not last this long, an independent testing laboratory decided to test the company’s claim with a random sample of 42 batteries. The data from the 42 batteries appeared to be unimodal and symmetric with a mean 97 hours and a standard deviation of 12 hours. Find a 90 % confidence interval for \muμ. Round your interval values...
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...
A company claims that the mean battery life of their MP3 player is = 30 hours....
A company claims that the mean battery life of their MP3 player is = 30 hours. You suspect this claim is incorrect and find a random sample of 18 MP3 players has a mean battery life of 28.5 hours and a standard deviation of 7 hours. Is there enough evidence to reject the null hypothesis a=0.01?         Ho: u=30 Ha: not = 30.
A company claims that the mean battery life of their MP3 players at least 30 hours....
A company claims that the mean battery life of their MP3 players at least 30 hours. You suspect this claim is incorrect and find that a random sample of 18 MP3 players has a mean battery life of 28.5 hours and a standard deviation of 1.7 ours. Is there enough evidence to reject the claim at α=0.01? Find the standardized test statistics t Decide whether to reject or fail to reject the null hypothesis
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT