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Refrigerant 134a undergoes a process for which the pressure-volume relation is P?n = constant. The initial and final states of the refrigerant are fixed by P1 = 200 kPa, T1 = -10°C and P2 = 1000 kPa, T2 = 50°C, respectively. (a) Draw a T- v diagram, label the saturated temperature, the specific volumes and the temperatures of both the initial and final states. (b) Determine the work done during this expansion process, in kJ/kg. (c) Calculate the amount of heat that transferred into R-134a, in kJ/kg.
The following data were collected as part of a study of coffee consumption among male and female undergraduate students. The following reflects cups per day consumed:
The formula for a 95% confidence interval yields the interval 640 ± 5.88. Find out whether each of the given statements is true or false.
On average, the size of the difference between the sample mean and the population mean is predicted by:
Of the 250 students in a blind taste test, 150 (60%) preferred Milwaukee's Best over Natural Light. Then the 90% confidence interval for the student population proportion preferring Milwaukee's Best is:
Which of the following would be a reason to choose a Moving Average Forecast model instead of a Naïve Model to forecast a series of data into the future?
Although the line for A1 is crooked, the points on the line are consistently 5 points higher than the line for A2. What result is indicated by this pattern?
Suppose that 51% of the women who gave birth at a certain hospital last year were over 30 years old, and that 39% were unmarried.
What is a factor? How can the use of factors benefit a design, explain main effects and interaction effects and how does a covariate reduce noise?
The results, in tons of force required for breakage, are as follows: Determine the mean, median, range, and midrange. Calculate the mean absolute deviation (MAD).
The Investment Research Institute reported in its Mutual Fund Fact Book that the number of mutual funds increased from 5725 in 1999 to 7977 in 2009. What is the geometric mean annual percent increase in the number of funds?
It is reasonable to model their weights as independent random variables, find the probability that 100 packages will have a total weight exceeding 1700 lb.
A synopsis of a business related problem where statistics was used to solve the problem. The synopsis needs to include a discussion of the specific problem, the research methodology used, the quantitative and qualitative tools used
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