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Steam enters an adiabatic nozzle at 4000 kPa, 440 degrees Celsius, with a velocity of 75 m/s. At the exit, the pressure and velocity are 1800 kPa and 619 m/s, respectively. Determine the area (m^2) at the exit of the nozzle if the mass flow rate is 1.85 kg/s.
Start rolling dice until a particular number, say 3, is obtained, and keep track of how many rolls are necessary. Repeat 100 times. Then find the average.
Test the hypothesis that more than 60 percent of the U.S. senators (of a total 100 senators) favor the president's economic plan, if a sample of 40 showed that 22 favor the plan (use alpha = .05).
Calculate the P-value for the test of the hypothesis p1 - p2=0. Let p1 represent the population proportion of eligible students in Pennsylvania.
The five year surival rate for Caucasians for all forms increased from 37% in 1960 to 58% now. Express this change in two ways (1) as an absolute difference in terms of percentage points and (2) as a relative difference in terms of percent.
a helical tension spring is made of 1.2 mm wire having a yield strengths of 1280 mpa tension and 740 mpa torsion. the
suppose an actual census showed that 20 of the households in michigan have incomes in excess of 60000. assume that a
The following data was randomly drawn from a normal population. At an alpha level of .05, does the mean of the population differ significantly from -150. Use Excel.
In a recent study 90 percent of the homes in the United States were found to have largescreen TVs. In a sample of nine homes, what is the probability that:
because only two of the seven regression coefficients are statistically significant. Yet in some initial trials the expanded model is giving more precise sales predictions than the smaller model. The reasons for this anomaly are now being investig..
Find the probability that a randomly selected man will be shorter than 78.1 inches. Don't forget the diagrams for (b) and (c).
A metropolitan school system consists of two districts- north and south. the north district contains 60% of all students, and the south district contains 40% of all students.
Describe the sampling distribution of p-hat, the sample proportion of college students with the cell phones who send or receive the text messages with their phones.
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