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Estimate the shaft power (in Horsepower) requirement to pump 247,063 L/hr of water available at 25oC and atmospheric pressure from a storage tank. The rated differential head requirement is 31 m.
Assume the efficiency of the pump to be 65%.
At 25oC, the density of the water = 0.994 g/cm3
Gravitation force = 9.8 m/s2
A sample of 50 bottles reveals a mean weight of 502.1 ml. Construct and interpret a 90% confidence interval for the mean. Be sure to interpret the meaning of this interval.
The density of nitrogen gas is 1.2506 X 10-3 g cm-3 and that of oxygen gas is 1.4290 x 10-3 g cm-3. Which gas will diffuse faster?
the totals of individual weights of garbage discard by 62 households in one week have a sample mean of 24.443 lb.
altitude and temperature listed below are altitudes thousands of feet and outside air temperatures degrees fahrenheit
There is a 60 percent chance that the event A will occur. If A does not occur, there is a 10 percent chance that B will occur. What is the probability that at least one of the events A or B occur?
A researcher follows 200 women who exercise regularly and 300 women who do not exercise regularly. After 30 years of follow-up, 20 of the women in the exercise group are diagnosed with osteoporosis while 30 women in the non-exercise group are dia..
Polls showed the two main candidates in the 2004 presidential election were nearly tied on the day before the election. To predict the winner a newspaper would like to have a poll that has margin of error less than 1%. Roughly how large a sample w..
assume the probability that a newborn is a boy is 51 that is p 051. suppose a family has 8 children. a what is the
How is the null hypothesis chosen (why is it null)? What is the importance of rejecting the null hypothesis in relation of the sample to the population?
What is an interaction? Describe an example and identify the variables within your population (work, social, academic, etc.) for which you might expect interactions?
suppose an airline decides to conduct a survey of its customers to determine their opinion of a proposed one-bag limit.
Program measured in minutes is found to follow a gamma distribution with parameters a=3 and b=2. what is the probability that CPU demand of a program will exceed 1 minute?
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