1.
The Environmental Department monitors sulphur dioxide (SO2) emission of ABC
powerplant...
Mathematics, 20.04.2020 08:10 pinapunapula
1.
The Environmental Department monitors sulphur dioxide (SO2) emission of ABC
powerplant every hour. Assume the concentration of SO2 from ABC powerplant is normal
distributed. The powerplant claims that the average SO2 emission is 75 ppb (parts per
billion) and the standard deviation is 0.75 ppb. The Environmental Department set the
standard of SO2 concentration for all powerplants is 77 ppb.
(a)
There are randomly selected 11 powerplants in this country with mean of 75.2 ppb and standard deviation of 0.4 ppb.
(i)Construct a 90% confidence interval for the population mean and interpret the result.
(ii)Determine the assumption in a(i).
Answers: 1
Another question on Mathematics
Mathematics, 21.06.2019 17:00
Which of the following equations is of the parabola whose vertex is at (4, 3), axis of symmetry parallel to the y-axis and focus at (4, -3)? a.) y+3=1/24 (x+4)^2 b.)y-3=-1/24 (x-4)^2 c.)x-4=-1/24 (y-3)^2
Answers: 3
Mathematics, 21.06.2019 17:20
Match the equivalent expressions. x - 3y + 12 12 - 3y - 2x + x + 2x 3x + 2y - 2x + y + 12 3y + 12 3x + y - 12 4y + 3y + 3x - 6y - 10 - 2 x + 3y + 2x - 3x + 7 + 5 x + 3y + 12 5 + 2y + 7x - 4x + 3y - 17
Answers: 1
Mathematics, 21.06.2019 19:50
The graph shows the distance kerri drives on a trip. what is kerri's speed . a. 25 b.75 c.60 d.50
Answers: 1
You know the right answer?
Questions
Mathematics, 16.02.2022 23:40
English, 16.02.2022 23:40
English, 16.02.2022 23:40
English, 16.02.2022 23:40
Mathematics, 16.02.2022 23:40
Advanced Placement (AP), 16.02.2022 23:50
Health, 16.02.2022 23:50
English, 16.02.2022 23:50
Mathematics, 16.02.2022 23:50
Biology, 16.02.2022 23:50
