Question

In: Statistics and Probability

J.D. Powers and Associates surveyed cell phone users in order to learn about the minutes of...

J.D. Powers and Associates surveyed cell phone users in order to learn about the minutes of cell phone usage per month. Minutes per month for a sample of 15 cell phone users are shown here. Is the data value 1280 an outlier? 105 135 180 210 245 250 265 380 395 420 430 615 690 830 1280

Solutions

Expert Solution

orchestra answered 1 year ago
Next > < Previous

Related Solutions

J.D. Powers and Associates surveyed cell phone users in order to learn about the minutes of...
J.D. Powers and Associates surveyed cell phone users in order to learn about the minutes of cell phone usage per month. Minutes per month for a sample of 15 cell phone users are shown here. What is the interquartile range (IQR) of the data set? 30   135      180      210      245      250      265      380      395      420      430      615      690      830 880
A study on cell phone use measured the number of minutes people chat on their cell...
A study on cell phone use measured the number of minutes people chat on their cell phones each day. Three age groups were measured and were found to be normally distributed. Use the data below to answer the following questions. Ages 11-21: µ = 306 mins., σ = 30 mins. Ages 21-30: µ = 189 mins., σ = 22 mins. Ages 31-40: µ = 240 mins., σ = 15 mins. a) What percent of 21-30 year-old cell users talk 150...
A study on cell phone use measured the number of minutes people chat on their cell...
A study on cell phone use measured the number of minutes people chat on their cell phones each day. Three age groups were measured and were found to be normally distributed. Use the data below to answer the following questions. Ages 11-21: µ = 306 mins., σ = 30 mins. Ages 21-30: µ = 189 mins., σ = 22 mins. Ages 31-40: µ = 240 mins., σ = 15 mins. a) What percent of 21-30 year-old cell users talk 150...
A study of 420,042 cell phone users found that 130 of them developed cancer of the...
A study of 420,042 cell phone users found that 130 of them developed cancer of the brain or nervous system. Prior to this study of cell phone​ use, the rate of such cancer was found to be 0.0323​% for those not using cell phones. Complete parts​ (a) and​ (b). a. Use the sample data to construct a 95​% confidence interval estimate of the percentage of cell phone users who develop cancer of the brain or nervous system. a. __% <...
In a study of 420,087 cell phone users, 108 subjects developed cancer of the brain or...
In a study of 420,087 cell phone users, 108 subjects developed cancer of the brain or nervous system. Test the claim of a somewhat common belief that such cancers are affected by cell phone use. That is, test the claim that cell phone users develop cancer of the brain or nervous system at a rate that is different from the rate of 0.0340% for people who do not use cell phones. Because this issue has such great importance, use a...
A study of 420,040 cell phone users found that 133 of them developed cancer of the...
A study of 420,040 cell phone users found that 133 of them developed cancer of the brain or nervous system. Prior to this study of cell phone​ use, the rate of such cancer was found to be 0.0337​% for those not using cell phones. Complete parts​ (a) and​ (b). a. Use the sample data to construct a 95​% confidence interval estimate of the percentage of cell phone users who develop cancer of the brain or nervous system. ​(Round to three...
In a study of 420,009 cell phone users found that 139 of them developed cancer of...
In a study of 420,009 cell phone users found that 139 of them developed cancer of the brain or nervous system. Prior to this study of cell phone​ use, the rate of such cancer was found to be 0.0439% for those not using cell phones. Complete parts​ (a) and​ (b). a. Use the sample data to construct a 95​% confidence interval estimate of the percentage of cell phone users who develop cancer of the brain or nervous system. ​% <...
A study of 420,026 cell phone users found that 138 of them developed cancer of the...
A study of 420,026 cell phone users found that 138 of them developed cancer of the brain or nervous system. Prior to this study of cell phone use, the rate of such cancer was found to be 0.0411% for those not using cell phones. The data are from the Journal of the National Cancer Institute. a. Use the sample data to construct a 95% confidence interval estimate of the percentage of cell phone users who develop cancer of the brain...
A study showed that 15 of 30 cell phone users with a headset missed their exit,...
A study showed that 15 of 30 cell phone users with a headset missed their exit, compared with 3 of 30 talking to a passenger. Construct a 90 percent confidence interval for the difference in proportions. (Round your answers to 4 decimal places. A negative value should be indicated by a minus sign.) The 90 percent confidence interval is from ___ to ___ .
In a study of 420,122 cell phone​ users, 103 subjects developed cancer of the brain or...
In a study of 420,122 cell phone​ users, 103 subjects developed cancer of the brain or nervous system. Test the claim of a somewhat common belief that such cancers are affected by cell phone use. That​ is, test the claim that cell phone users develop cancer of the brain or nervous system at a rate that is different from the rate of​ 0.0340% for people who do not use cell phones. Because this issue has such great​ importance, use a...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT