Standard deviations of the mean
For a normal distribution, find the probability that an observation falls within 0.92 standard deviations of the mean.
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Three charges are fixed in the x-y plane as follows: 1.7nC at the origin (0,0); 2.2nC at (0.65m, 0); -1.8nC at (0,1.60m). Find the magnitude of the force acting on the charge at the origin.
At one college, GPAs are normally distributed with a mean of 2.6 and a standard deviation of 0.4. What percentage of students at the college have a GPA between 2.2 and 3?
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