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A certain airplane has two independent alternators to provide electrical power. The probability that a given alternator will fail on a 1-hour flight is .02. What is the probability that (a) both will fail? (b) Neither will fail? (c) One or the other will fail? Show all steps carefully.
Make a forecast for 2004, using either the fitted trend model or a judgment forecast. Why is it best to ignore earlier years in this data set?
Compute the variance and standard deviation
A frequency polygon: does not depend on one variable. True-False
If we know that the length of time it takes a college student to find out a parking spot in library parking lot follows a normal distribution with a mean of 3.5 minutes and a standard deviation of 1 minute
What is the expected number of crimes that will be solved? What is the standard deviation?
She believes that the number of customers served on weekdays follows a normal distribution. Construct an 99% confidence interval of the average number of customers served on weekdays.
Suppose the sample variance for 30 parts turns out to be s 2 = .0005. Use α = .05 to test whether the population variance specification is being violated.
For the normal distribution curve with mean of 19 and a standard deviation of 6, which range of the variable shows an area under the curve corresponding to a probability of approximately 99.7%?
Define the Linear programming problem (LPP)
Eighty-eight shoppers were interviewed at random, and 59 said that they prefer to shop alone.
How large should n be so that the standard deviation of is no more than 0.01 and sampling distribution
Determine point estimate of population mean? By using 90% confidence, determine the margin of error?
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