Probability of choosing a factor
If there is a set of twenty cards, numbered 1 to 20, picked at random, what is the probability of choosing a factor of 18?
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Find the probability mass function of X and also that of Y. Compute E(X) and E(Y ). Compute V ar(X) and V ar(Y ).
Give 95% confidence interval for the true proportions of those carholders who will registere for the offer. If the acceptance rate is oly 2% or less, the campaign wont be worth the expense. give the confidence interval you found, what would you say.
If using the similitude assumption (e.g., keeping Re the same), what is the required length of the wind tunnel model if test speed is 80 m/sec? Is this a good idea?
Suppose that 73% of all politicians and 36% of all lawyers are liars. At a certain gathering, 68% of the attendees are the lawyers and the rest are politicians. An attendee is selected at random and it is discovered that he or she is a liar. What,
What would be the volume of a balloon filled with 4.77 L ofH2 gas collected at 1,553 mmHg if the pressure were increased to 2,131 mmHg?
At steady state, the energy transfer rate by conduction through a 1m^2 area of a wall is 0.15 kW. If the temperature distribution is linear through the wall, what is the temperature difference across the wall, in K ?
The period of a pendulum is estimated by measuring the starting and stopping times and taking their difference. If the starting and stopping times are measured independently, each with standard deviation 0.2 s, what is the standard deviation of th
The force, in N, exerted by gravity on a mass of m kg is given by F = 9.8m. Objects of a certain type have mass whose mean is 2.3 kg with a standard deviation of 0.2 kg. Find the mean and standard deviation of F.
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