Mathematics, 07.12.2021 05:30 tbenjamin1299
An article in Fire Technology investigated two different foam expanding agents that can be used in the nozzles of fire-fighting spray equipment. A random sample of five observations with an aqueous film-forming foam (AFFF) had a sample mean of 4.7 and a standard deviation of 0.6. A random sample of five observations with alcohol-type concentrates (ATC) had a sample mean of 6.9 and a standard deviation 0.8. Assume that both populations are well represented by normal distributions with the same standard deviations.
a. Find a 95% confidence interval on the difference in mean foam expansion of these two agents.
b. Based on the confidence interval, is there evidence to support the claim that there is no difference in mean foam expansion of these two agents?
Answers: 3
Another question on Mathematics
Mathematics, 21.06.2019 17:40
Follow these steps using the algebra tiles to solve the equation −5x + (−2) = −2x + 4. 1. add 5 positive x-tiles to both sides and create zero pairs. 2. add 4 negative unit tiles to both sides and create zero pairs. 3. divide the unit tiles evenly among the x-tiles. x =
Answers: 2
Mathematics, 21.06.2019 18:30
F(x)=x^3+4 question 6 options: the parent function is shifted up 4 units the parent function is shifted down 4 units the parent function is shifted left 4 units the parent function is shifted right 4 units
Answers: 1
You know the right answer?
An article in Fire Technology investigated two different foam expanding agents that can be used in t...
Questions
Physics, 26.06.2019 05:00
Mathematics, 26.06.2019 05:00
English, 26.06.2019 05:00
Computers and Technology, 26.06.2019 05:00
Mathematics, 26.06.2019 05:00
History, 26.06.2019 05:00
Spanish, 26.06.2019 05:00
History, 26.06.2019 05:00
