Noon pollution level
A certain 12:00 noon pollution level was found to be normally distributed and to have a mean of 7.9 and a standard deviation of 1.1. What is the probability of having a level between 3.3 and 7.4 at noon on a random day?
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The power of this test(as a percent with two decimal place precision) for H1: mu=3.25 is Blank 2 What minimum sample size (as an integer) would be required to reject the null hypothesis if H1: mu=3.25? Blank 3
What gauge pressure is required in the city water mains for a stream from a fire hose connected to the mains to reach a vertical height of 17.0 m ? (Assume that the mains have a much larger diameter than that of the fire hose.)
Pipe is manufactured with a mean diameter of 1.01 inches and a standard deviation of 0.003 inches. Find the probability that a random sample of size 9 sections will have a sample mean between 1.012 and 1.009 inches. Present the probability as a pe
Air in an elastic balloon of initial diameter .2 m and internal pressure of 400 kPa expands to twice its initial diameter. How much work is done by air in the process?
It is compressed slowly to 10 liters in a polytropic process with n=2 then compressed furthur to 5 liters in a second polytropic process in which n=1.5. Find the total work done by carbon dioxide.
In the operating room, anesthesiologists use mass spectrometers to monitor the respiratory gases of patients undergoing surgery. One gas that is often monitored is the anesthetic isoflurane (molecular mass = 3.06 10-25 kg).
In 1960, census results indicated that the age at which American men first married had a mean of 23.3 years. It is widely suspected that young people today are waiting longer to get married. A random sample of 20 men who married for the first time
The average diameter of sand dollars on a certain island is 4.50 centimeters with a standard deviation of 0.70 centimeters. If 9 sand dollars are chosen at random for a collection,
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