Hi! I need answers on letters A and B. Thank you! It would mean a lot. The reaction of a certain air pollutants with rainwater causes acid rajn that corrodes exposed metals. Suppose that water samplesfrom eight instances of rainfall are collected and analyzed for aciditv (indicated bv DH level). vielding the following pH levels.3.7 3.9 4.0 3.5 4.2 4.54.13.8a) Find a 98% confidence interval for the true mean pH level of råinfall.b) If pure falling rain through clean air.registers a pH level of 5.7, what conclusion can you give regarding the rainfall data that youcallected?A a). [3.63, 4.29] and b). the collected rainfall is more acidic.compared to pure falling rainB a). [2.99, 4.67] and b). the collected rainfall is less acidic compared to pure falling raina). [4.29, 5.89] and b). the collected rainfall and pure falling rain have equal acidityD a). [3.96, 5.80] and b). the collected rainfall is average in terms of acidity compared to pure falling rain.

The data shows the pH level of rainfall for eight instances.

Answered: The reaction of a certain air…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Hi! I need answers on letters A and B. Thank you! It would mean a lot.

The reaction of a certain air pollutants with rainwater causes acid rajn that corrodes exposed metals. Suppose that water samples
from eight instances of rainfall are collected and analyzed for aciditv (indicated bv DH level). vielding the following pH levels.
3.7 3.9 4.0 3.5 4.2 4.5
4.1
3.8
a) Find a 98% confidence interval for the true mean pH level of råinfall.
b) If pure falling rain through clean air.registers a pH level of 5.7, what conclusion can you give regarding the rainfall data that you
callected?
A a). [3.63, 4.29] and b). the collected rainfall is more acidic.compared to pure falling rain
B a). [2.99, 4.67] and b). the collected rainfall is less acidic compared to pure falling rain
a). [4.29, 5.89] and b). the collected rainfall and pure falling rain have equal acidity
D a). [3.96, 5.80] and b). the collected rainfall is average in terms of acidity compared to pure falling rain.

Definition Definition Measure of central tendency that is the average of a given data set. The mean value is evaluated as the quotient of the sum of all observations by the sample size. The mean, in contrast to a median, is affected by extreme values. Very large or very small values can distract the mean from the center of the data. Arithmetic mean: The most common type of mean is the arithmetic mean. It is evaluated using the formula: μ = 1 N ∑ i = 1 N x i Other types of means are the geometric mean, logarithmic mean, and harmonic mean. Geometric mean: The nth root of the product of n observations from a data set is defined as the geometric mean of the set: G = x 1 x 2 ... x n n Logarithmic mean: The difference of the natural logarithms of the two numbers, divided by the difference between the numbers is the logarithmic mean of the two numbers. The logarithmic mean is used particularly in heat transfer and mass transfer. ln x 2 − ln x 1 x 2 − x 1 Harmonic mean: The inverse of the arithmetic mean of the inverses of all the numbers in a data set is the harmonic mean of the data. 1 1 x 1 + 1 x 2 + ...

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