![subject](/tpl/images/cats/mat.png)
Mathematics, 23.03.2020 18:54 baileyanne9389
An electrical rm manufactures light bulbs that have a life span that is approximately normally distributed. The population standard deviation is not known. A sample of 30 bulbs are found to have an average life span of 800 hours and a sample standard deviation of 45 hours. Test the hypothesis that µ = 800 against the alternative µ ≠800 if a random sample of 30 bulbs has an average life 788 hours. Use P value in your answer.
![ansver](/tpl/images/cats/User.png)
Answers: 2
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Mathematics
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 18:00
John read the first 114 pages of a novel, which was 3 pages less than 1/3 of the novel. write an equation to determine the total number of pages (p)(p) in the novel.
Answers: 1
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 19:00
Which sentence uses an objective tone? we will plant the best garden of any school in the area. the new campus garden will surely be envied by other schools. a garden would provide numerous benefits to the students. you will probably agree that gardens have many benefits.
Answers: 3
You know the right answer?
An electrical rm manufactures light bulbs that have a life span that is approximately normally distr...
Questions
![question](/tpl/images/cats/mat.png)
Mathematics, 23.09.2019 13:30
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/istoriya.png)
History, 23.09.2019 13:30
![question](/tpl/images/cats/mat.png)
Mathematics, 23.09.2019 13:30
![question](/tpl/images/cats/istoriya.png)
History, 23.09.2019 13:30
![question](/tpl/images/cats/ekonomika.png)
Business, 23.09.2019 13:30
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/istoriya.png)
History, 23.09.2019 13:30
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/health.png)
Health, 23.09.2019 13:30
![question](/tpl/images/cats/mat.png)
Mathematics, 23.09.2019 13:30
![question](/tpl/images/cats/en.png)
English, 23.09.2019 13:30
![question](/tpl/images/cats/biologiya.png)
Biology, 23.09.2019 13:30
![question](/tpl/images/cats/obshestvoznanie.png)
![question](/tpl/images/cats/health.png)
![question](/tpl/images/cats/health.png)
Health, 23.09.2019 13:30
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 23.09.2019 13:30