Find mean and variance of number of students who saw event
An independent poll of college students showed that fifty percent of college students watched the Winter Olympics. For a sample of 120 students selected at random, what is the mean and variance of the number of students who watched this event?
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An investor owns three common stocks. Each stock, independent of the others, has equally likely chances of (1) increasing in value, (2) decreasing in value, or (3) remaining the same value. Calculate the probability at least one of the stocks incr
A certain component is critical to the operation of a construction machine and must be replaced immediately upon failure. If the mean lifetime of this type of component is 100 hours and its standard deviation is 30 hours, how many of the component
Given a transmission speed of T bits/second, a packet size of B bytes, a propagation speed of P m/s and a cable length of L meters, what size of packet will result in the last bit being transmitted just as the first bit of the packet arrives at the "
If you treat an electron as a classical spherical object with radius 1.90×10-17m , what angular speed ω is necessary to produce a spin angular momentum of magnitude 3/4---√?? Use h = 6.63×10-34J⋅s for Planck's constant
For a sample of 120 students selected at random, what is the mean and variance of the number of students who watched this event?
Describe a situation that might be viewed differently by two people?
We assume tha t the delay for each switch (including waiting and processing) is 3,10, 20, 7, and 20 ms respectively. Assuming that the propagation speed is 2 x 10 8 m,find the order the da t agr ams arrive a t the destination and the delay
A negligible amount of this energy goes to the resulting 5726Fe atom as kinetic energy. About 90 percent of the time, after the electron-capture process, the 5726Fe nucleus emits two successive gamma-ray photons of energies 0.122MeV
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