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Biology and Environmental Science
The salinity, or salt content, in the ocean is expressed in parts per thousand (ppt). The number varies with depth, rainfall, evaporation, river runoff, and ice formation. The mean salinity of the oceans is 35 ppt. Suppose the distribution of salinity is normal and the standard deviation is 0.52 ppt, and suppose a random sample of ocean water from a region in the tropical Pacific Ocean is obtained.
a. What is the probability that the salinity is more than 36 ppt?
b. What is the probability that the salinity is less than 33.5 ppt?
c. A certain species of fish can only survive if the salinity is between 33 and 35 ppt. What is the probability that this species can survive in a randomly selected area?
d. Find a symmetric interval about the mean salinity such that 50% of all salinity levels lie in this interval. What are the endpoints of this interval called?
Design a PID compensator Gc1(s) and a lead-lag compensator GC2(s) such that, in each case, the closed-loop system is stable in the presence of a time-delay T = 0.1 s. Discuss the capability of each compensator to insure stability in the presence o..
This information was also obtained from monitored calls. At the .05 significance level does it take longer to resolve software issues? What is the p-value?
Using your browser's "people finder" capability, find out how many telephone listings are in your state for people with the same last name as yours. How many listings are there in your state for people named Smith?
Describe the concepts of disruptions and risks as they apply to transportation. Why are they important from financial and service standpoints?
Suppose Ho: px = py isbeingtested agrunst H1:Px *py oo the basis of two independent sets of 100 Bernoulli trials. If x , the number of successes in the first set, is 60 and y , the number of successes in the second set, is 48, what P-value would b..
(a) Construct a histogram for the data and describe its properties. (b) Construct a runs chart for the data. (c) Write a brief summary of the two data displays contrasting the infor mation gained by each plot.
q1. length of pregnanciesthe length of human pregnancies from conception to birth varies according to a distribution
What is the difference between descriptive and inferential statistics?- Describe the most common descriptive statistics.
If she performs 15 demonstrations this week, what is the probability of her being satisfactory? What is the probability of between 4 and 8 (inclusive) orders?
Use the Histogram option in Data Analysis to check the assumption of normality. Comment on the findings.
a consumer advocacy group recorded several variables on 140 models of cars. the resulting information was used to
A manager wishes to find out whether there is a relationship between the number of radio ads aired per week and the amount of sales of a product. the data for the sample are shown below?
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