Mathematics, 14.04.2020 23:11 armonilucky11
Local government is worried that runoff from a corporate farm has caused water in a nearby stream to become acidic. The pH is used to measure the acidity/alkalinity of a substance. Pure water, for instance, has a pH of 7, and smaller pH values indicate acidity, while larger values indicate alkalinity. A contractor is hired to test the hypothesis that the water is significantly acidic.
H0: μ = 7
HA: μ < 7
The contractor took 27 water samples and found an average pH of 6.3 with a sample standard deviation of 1.86.
What is the test statistic for this sample? Give your answer to 2 decimal places.
Answers: 1
Mathematics, 21.06.2019 15:50
(08.01)consider the following pair of equations: x + y = −2 y = 2x + 10 if the two equations are graphed, at what point do the lines representing the two equations intersect? (−4, 2) (4, 2) (−2, 4) (2, 4)
Answers: 2
Mathematics, 21.06.2019 17:30
The table shows the balance of a money market account over time. write a function that represents the balance y(in dollars) after t years.
Answers: 2
Mathematics, 21.06.2019 18:00
Plz determine whether the polynomial is a difference of squares and if it is, factor it. y2 – 196 is a difference of squares: (y + 14)2 is a difference of squares: (y – 14)2 is a difference of squares: (y + 14)(y – 14) is not a difference of squares
Answers: 1
Mathematics, 21.06.2019 21:30
40) linda was making chocolate truffles for the first day of school. the recipe for 20 chocolate truffles is: i cup of cream 2 cups of dark chocolate she noticed this will not be enough truffles for the 42 sure that all students in each homeroom next year. to be sure that all students receive a truffle, linda must adjust her recipe. a. complete the recipe for 42 truffles cups of cream - cups of dark chocolate work:
Answers: 2
Local government is worried that runoff from a corporate farm has caused water in a nearby stream to...
English, 26.01.2021 14:00
Mathematics, 26.01.2021 14:00
Physics, 26.01.2021 14:00
English, 26.01.2021 14:00
Mathematics, 26.01.2021 14:00
Mathematics, 26.01.2021 14:00
English, 26.01.2021 14:00
Advanced Placement (AP), 26.01.2021 14:00
Mathematics, 26.01.2021 14:00
Business, 26.01.2021 14:00
History, 26.01.2021 14:00
Mathematics, 26.01.2021 14:00
Mathematics, 26.01.2021 14:00
English, 26.01.2021 14:00