Confidence interval for the population standard deviation
The following sample of heights was taken from 7 cans off the assembly line:
12.9, 12.9, 12.8, 12.9, 13.4, 13.2, 12.6
Build a 90% confidence interval for the population standard deviation for all cans that come off the assembly line.
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A loundspeaker diaphragm is producing a sound for 2.1 s by moving back and forth in a simple harmonic motion. The angular frequency of the motion is 8.44 104 rad/s. How many times does the diaphragm move back and forth?
When a 2.3L sample of hydrogen gas at 25oCis heated to 120oC at constant pressure, what is the new volume of the gas? What is the pressure of a sample of 35g of nitrogen gas in a5.6L container at 90oC?
An exercise machine indicates that you have worked off 2.5 Calories in a minute-and-a-half of running in place. What was your power output during the time? Give your answer in both watts and horsepower.
A piece of metal of mass 12 g at 107 ?C is placed in a calorimeter containing 55.7 g of water at 20?C. The final temperature of the mixture is 27.6?C. What is the specific heat capacity of the metal?
A very long uniform line of charge has charge per unit length 4.74*10^-6 C/m and lies along the x-axis. A second long uniform line of charge has charge per unit length -2.56*10^-6 C/m and is parallel to the x-axis at y_1 = 0.416 m.
If 0.145g of this metal carbonate reacts completely with.125L of HCl(aq) with a pH of 1.56, what is the identity of the metal in this carbonate?
In order to improve the signal transmitted reliablity, the signal to be transmitted will be sent five independent times to the reciever. The reciever will then interpret the signal to be a 1 if he/she recieves at least three 1's among the five tr
A fair coin is tossed 8 times. What is the probability that the sequence HTTT occurs at least once in the 8 tosses?
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