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In order to etch an aluminum tray successfully, the pH of the acid solution used must be between 1 and 4. This acid solution is made by mixing a ?xed quantity of etching compound in powder form with a given volume of water. The actual pH of the solution obtained by this method is affected by the potency of the etching compound, by slight variations in the volume of water used, and perhaps by the pH of the water. Thus, the pH of the solution varies. Assume that the random variable that describes the random phenomenon is gamma distributed with α = 2 and β = 1.
(a) What is the probability that an acid solution made by the foregoing procedure will satisfactorily etch a tray?
(b) What would the answer to part (a) be if α = 1 and β = 2?
suppose a simple random sample of size 50 is selected from a population with ? 10. find the value of the standard
The sample standard deviation of the first set of strengths was 8.2 ksi, the second set's S value was 9.8 ksi, and the S value for the 25 differences in strengths was 3.3 ksi.
In fitting a least squares line to n=15 data points, the following quantities were computed: SSxx=55, SSyy=198, SSxy=-88, x-bar=1.3, and y-bar=35.
Thirty-five percent of the democrats and 70% of the republicans favor the bill. the bill needs a simple majority to pass. using a probability tree, determine the probability that the bill will pass.
The mean weight was 2.9 pounds with standard deviation of .6 pounds find a 90% confidence interval for the population mean of the fall lobster.
the distrubution with parameter thetacedil has pdf fy theta1thetae-ytheta where 0ltxltinfinity and thetagt0.find1. the
what do you conclude about the claim below? do not use formal procedures or exact calculations. use only the rare event
For a randomly select customer, what is the probability that this customer
What is the natural model for design and how many d.f. are there for each term in the model - design while the design was still being created.)
Iindicate what two populations are being compared, (b) state the research hypothesis, (c) state the null hypothesis, and (d) say whether you should use a one-tailed or two-tailed test and why.
a government agency has specialists who analyze the frequencies of letters of the alphabet in an attempt to decipher
a paper studied various aspects of bus service and presented data on travel times from several different routes. the
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