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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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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