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Question - Linear Function Suppose X is a discrete random variable with mean mX and variance s2X. Let Y be a linear function of X, such that Y = aX + b, where a and b are constants. Find the mean and variance of Y in terms of mX and s2X.
If the manager of a paint supply store wants to estimate, with 95% confidence, the mean life of light bulbs to within +/-20 hours and also assumes that the population standard deviation is 100 hours, how many light bulbs need to be selected?
Estimate the probability that the next time you ride in a car, you will not be delayed because of some car crash blocking the road.
Pollsters attempt to find out whether or not person is a "likely voter" before they count their opinion in poll. If we suppose 40% of registered voters will really vote.
use a x2 test of association to test the claim that in the given contingency table the row variable and the column
A manufacturer claims that the mean life of batteries manufactured by his company is at least 44 months. A random sample of 40 of these batteries was tested, resulting in a sample mean life of 41 months with a sample standard deviation of 16 month..
What is the difference between linear impact and linear correlation?
Discuss your second individual variable, using graphical, numerical, summary, and interpretation.
Draw the model for these IQ scores. Clearly label it, showing what the 68 - 95 - 99.7 Rule predicts about the scores.- In what interval would you expect the central 95% of IQ scores to be found?
a large study was conducted to test the effectiveness of a drug in combination with aspirin in warding off heart
Find the probability that the number of cars sold tomorrow will be between two and four (both inclusive).- Find the cumulative distribution function of the number of cars sold per day.
Four different brands of a pain medication used for chronic back ailments were tested to see if the number of side effects for each brand were the same. The table below lists the results of the reported number of side effects for each brand of pa..
A process is under control and follows a normal distribution with mean 100 and standard deviation 10. In constructing a standard -chart for this process, the control limits are set 3 standard deviations from the mean-i.e., 100 . The probability of o..
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