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Consider a simple double-pipe heat exchanger where a liquid stream is being heated by condensing leaves (z L) at TL(L. t). Heat transfer takes place between the steam (TS and the wa (T nd then is a "lumped" variable, Ts.
a) Develop a mathematical model to determine the dynamics of wall temperature Tw as function of time.
b) Develop a mathematical model to determine the dynamics temperature TL of Liquid.
suppose that you work for the child social services agency in your county. your job is to investigate instances of
suppose referendum to increase funding for education is on the ballot in a large town population over 100000. an exit
In a sample of 55 mice, a biologist found that 42% were able to run a maze in 30 second or less. Find the 90% limit for the population proportion of mice who can run a maze in 30 second or less.
Some food retailers propose subjecting food to a low level of radiation in order to improve safety, but sale of such "irradiated" food is opposed by many people. Suppose a grocer wants to find out what his customers think.
Evidence of statistical interaction or effect modification. What is the odds ratio for diabetes in a man aged 65 compared with a woman aged 60 (both have the same waist circumference)?
How can you or your department decide whether or not the variation is important? How could using a mean difference test help?
Firing temperature varies slightly at different locations in the kiln, and ?ring temperature may also affect cracking. Discuss the design of an experiment to collect information that could be used to decide between the two clay types. How does yo..
an american roulette wheel has 38 slots 18 are red 18 are black and 2 are green. let r be the number of spins until you
You calculate the difference in income as (after incentive plan - before incentive plan). You want to test whether income after the incentive plan is different from income before the incentive plan. What are the hypotheses for this test?
Construct a 95% confidence interval to estimate the population mean with a sample mean = 110 and ? = 30 for the following sample sizes:
how is the t-test for correlated groups and the t-test for single samples similar and
Compare and contrast random selection and random assignment. Be sure to include a discussion of when you would want to do one or the other and the possible consequences of failing to do random selection or random assignment in particular situation..
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