An article suggests the lognormal distribution as a model for SO₂ concentration above a certain forest. Suppose the parameter values are μ = 1.8 and σ = 0.7.**(a) What are the mean value and standard deviation of concentration? (Round your answers to three decimal places.)**- Mean: 7.729 ✔- Standard deviation: 6.146 ✔**(b) What is the probability that concentration is at most 10? Between 5 and 10? (Round your answers to four decimal places.)**- At most 10: 0.7180 ✘- Between 5 and 10: (Input required)

Answered: An article suggests the lognormal…

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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Terri Vogel, an amateur motorcycle racer, averages 129.23 seconds per 2.5 mile lap (in a 7 lap race) with a standard deviation of 2.28 seconds. The distribution of her race times is normally distributed. We are interested in one of her randomly selected laps. (Source: log book of Terri Vogel) Let X be the number of seconds for a randomly selected lap. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X NO b. Find the proportion of her laps that are completed between 127.32 and 128.45 seconds. c. The fastest 4% of laps are under d. The middle 50% of her laps are from seconds. seconds to seconds.
Answer number 2 only.
Terri Vogel, an amateur motorcycle racer, averages 129.45 seconds per 2.5 mile lap (in a 7 lap race) with a standard deviation of 2.29 seconds . The distribution of her race times is normally distributed. We are interested in one of her randomly selected laps. (Source: log book of Terri Vogel) Let X be the number of seconds for a randomly selected lap. Round all answers to 4 decimal places where possible.a. What is the distribution of X? X ~ N()b. Find the proportion of her laps that are completed between 130.57 and 132.63 seconds. c. The fastest 3% of laps are under seconds.d. The middle 50% of her laps are from seconds to seconds.
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Calcium levels in people are normally distributed with a mean of 9.7 mgdL and a standard deviation of 0.5 mgdL . Individuals with calcium levels in the bottom 10% of the population are considered to have low calcium levels. Find the calcium level that is the borderline between low calcium levels and those not considered low. Carry your intermediate computations to at least four decimal places. Round your answer to one decimal place.
Terri Vogel, an amateur motorcycle racer, averages 129.52 seconds per 2.5 mile lap (in a 7 lap race) with a standard deviation of 2.28 seconds . The distribution of her race times is normally distributed. We are interested in one of her randomly selected laps. (Source: log book of Terri Vogel) Let X be the number of seconds for a randomly selected lap. Round all answers to 4 decimal places where possible.a. What is the distribution of X? X ~ N(,)b. Find the proportion of her laps that are completed between 128.63 and 129.99 seconds.c. The fastest 3% of laps are under seconds.d. The middle 80% of her laps are from seconds to seconds.
The time to complete an exam is approximately Normal with a mean m=39 minutes and Standard deviation o = 3 min. 95% of testing time were between______ minutes and______?__minutes. ___?____% of testing were betweenthe ti 36 and 42 minutes
Based on the computed descriptive statistics, compare the two distributions in terms of their measures of location and measures of dispersions. On the average, which group of students perform better academically in the previous term? Which group varies more? 1st image are the male students and the 2nd image are the female students.

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