Probability mass function
Suppose X has pmf (probability mass function) f(x)=1/5, x=1,2,3,4,5.
Compute E(X) and E(X^2) and use those two results to find E[(X+2)].
Expected delivery within 24 Hours
For a normal distribution, find the probability that an observation falls within 0.92 standard deviations of the mean.
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?
A sample consisting of various gases contains 3.8×10-6 mole fraction of radon. This gas at a total pressure of 34 atm is shaken with water at 30C. Calculate the molar concentration of radon in the water.
Suppose X has pmf (probability mass function) f(x)=1/5, x=1,2,3,4,5. Compute E(X) and E(X^2) and use those two results to find E[(X+2)].
What is the apparent depth of the reflection of the fish in the bottom of the tank when viewed at normal incidence?
A 9.528 quantity of zinc was allowed to react with 40.00 of sulfuric acid that had a density of 1.3028 . The reaction yielded gas and a solution of zinc sulfate.
What is the probability that Lisa smiles at Milhouse on exactly three days in a month? Use a Poisson approximation to calculate the probability that Lisa smiles at Milhouse on exactly three days in a month.
Property crime rates (per 100,000 residents) for the 50 states and the District of Columbia have a mean of 3377.2 and a standard deviation of 847.4. Assuming the distribution of property crime rates is normal, approximately all of the property cri
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