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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.
the telephone company wants to investigate the desirability of beginning a marketing campaign that would offer
Compute a 95% confidence interval for the average time spent in training per year at this firm. Develop a graph showing the data below as a frequency distribution. Note the mean and the confidence interval on the graph.
What is the alternative hypothesis for a null hypothesis stating that the average time a person keeps a cell phone is, at most, three years?
How can I conduct statistic experimental design for three independent variable (time, amount, temperature) are useful to predict Y? Please include any approach steps and How can I interpreted?
consider again the study of the association between depression and cardiac disease survivability which showed that of
a large study was conducted to test the effectiveness of a drug in combination with aspirin in warding off heart
A random sample of n = 4 scores is chosen from the population with µ = 80 and σ = 20. On average, how much difference would you expect between sample mean and population mean?
Nine percent of undergraduate students carry credit card balances greater than $7,000. Suppose 10 undergraduate students are selected randomly to be interviewed about credit card usage.
Mayfair's insurance company proposed a settlement based on lost sales of $240,000 in July and August. Is this amount fair? If not, what amount would you recommend as a counteroffer?
Compute the population attributable risk for smoking and lung cancer.
(a) At the 5 percent level of significance, does this sample prove a violation of the guideline that the average patient should pay no more than $250 out-of-pocket? State your hypotheses and decision rule. (b) Is this a close decision?
q1. a sample of 65 observations is selected from one population with a population standard deviation of 0.75. the
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