Mathematics, 25.04.2020 05:01 harris435942
In a sample of 80 light bulbs, the mean lifetime was 1217 hours with a standard deviation of 52 hours. Find a 95% confidence interval for the mean lifetime of this type of light bulb. Find a 98% confidence interval for the mean lifetime of this type of light bulb. An engineer claims that the mean lifetime is between 1208 and 1226 hours. With what level of confidence can this statement be made? How many light bulbs must be sampled so that a 95% confidence interval will specify the mean lifetime to within ±8 hours? How many light bulbs must be sampled so that a 98% confidence interval will specify the mean lifetime to within ±8 hours?
Answers: 2
Another question on Mathematics
Mathematics, 21.06.2019 18:00
On saturday a souvenir shop had 125 customers.sixty four percent of the costumers paid with a credit card. how many costumers paid with cash?
Answers: 1
Mathematics, 22.06.2019 02:30
Build is 120 wide 20 feet high 48 feet long how many cubic feet and the volume
Answers: 1
Mathematics, 22.06.2019 04:30
Of the total number of spectators at a circus show, 1/4 are men. 2/5 of the remaining number of spectators are women. there are 132 women at the circus show. how many children are at the circus show?
Answers: 2
You know the right answer?
In a sample of 80 light bulbs, the mean lifetime was 1217 hours with a standard deviation of 52 hour...
Questions
Social Studies, 18.11.2019 14:31
English, 18.11.2019 14:31
Mathematics, 18.11.2019 14:31
Chemistry, 18.11.2019 14:31
History, 18.11.2019 14:31
Mathematics, 18.11.2019 14:31
History, 18.11.2019 14:31
Mathematics, 18.11.2019 14:31
Social Studies, 18.11.2019 14:31
Mathematics, 18.11.2019 14:31
Mathematics, 18.11.2019 14:31
History, 18.11.2019 14:31
Mathematics, 18.11.2019 14:31
Chemistry, 18.11.2019 14:31
Mathematics, 18.11.2019 14:31
