Mathematics, 04.07.2020 14:01 arod20061
The amount of pollutants that are found in waterways near large cities is normally distributed with mean 8.5 ppm and standard deviation 1.4 ppm. 18 randomly selected large cities are studied. Round all answers to two decimal places.
A. xBar~ N( ) ()
B. For the 18 cities, find the probability that the average amount of pollutants is more than 9 ppm.
C. What is the probability that one randomly selected city's waterway will have more than 9 ppm pollutants?
D. Find the IQR for the average of 18 cities. Q1 =
Q3 =
IQR:
2. X ~ N(30,10). Suppose that you form random samples with sample size 4 from this distribution. Let xBar be the random variable of averages. Let ΣX be the random variable of sums. Round all answers to two decimal places.
A. xBar~ N(___) ()
B. P(xBar<30) =
C. Find the 95th percentile for the xBar distribution.
D. P(xBar > 36)=
E. Q3 for the xBar distribution =
Answers: 2
Mathematics, 21.06.2019 19:30
You deposit $5000 each year into an account earning 3% interest compounded annually. how much will you have in the account in 30 years?
Answers: 3
Mathematics, 21.06.2019 20:30
Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.
Answers: 1
Mathematics, 21.06.2019 22:30
Adistribution has the five-number summary shown below. what is the third quartile, q3, of this distribution? 22, 34, 41, 55, 62
Answers: 2
Mathematics, 21.06.2019 23:00
Solve the system of equations using the linear combination method. {4x−3y=127x−3y=3 enter your answers in the boxes.
Answers: 1
The amount of pollutants that are found in waterways near large cities is normally distributed with...
Mathematics, 03.02.2020 20:44
Geography, 03.02.2020 20:44
English, 03.02.2020 20:44
Social Studies, 03.02.2020 20:44
Mathematics, 03.02.2020 20:44
Biology, 03.02.2020 20:44
Health, 03.02.2020 20:44
Mathematics, 03.02.2020 20:44
Mathematics, 03.02.2020 20:44
Biology, 03.02.2020 20:44
Mathematics, 03.02.2020 20:44
Social Studies, 03.02.2020 20:44
Arts, 03.02.2020 20:44