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?
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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.
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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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