Probability of rain during the weekend
Suppose on the upcoming weekend there is a 50% chance of rain on Saturday and a 40% chance on Sunday. Furthermore, suppose that a rainy day is followed by another rainy day with probability 0.75. What is the probability of rain during the weekend?
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An aircraft landing gear has a probability of 10-5 per landing of being damaged from excessive impact. Assuming a landing per day, what is the maximum number of years for which one can give at least a 90% guarantee that the landing gear will stay
After the 300' pipe run, this 6" pipe has a sudden enlargement to an 8" (nominal pipe size) schedule 40 steel pipe and continue for another 200 ft with a submerged discharge. If the fluid is water at 60 Deg.F, what is the total loss of head length?
Determine (a) the air exit velocity to produce 5 lbf (b) the volumetric flow rate needed and (c) the minimum mechanical power that must be supplied to the airstream. Take the air density to be .081 lbm/ft^3
Aerodynamic drag exerts a resisting force (in newtons) of magnitude 0.8v^2 where v is the magnitude of the velocity. How long does it take for the rocket's velocity to increase to 200m/s?
Find the discharge with an annual exceedance probability of 0.02. Find the annual exceedance probability of the 1972 flood.
The lifetime of a certain transistor in a certain application has mean 900 hours and standard deviation 30 hours. Find the mean and standard deviation of the length of time that four transistors will last.
Calculate the standard error? Find the t-value corresponding to a sample size of 9. (Hint: Either use a t-table or Tools -> Statistical Tables in Gretl. The d.f. = 8 and the right-tail probability is 0.025.) Construct the 95% confidence interva
Calculate the standard error. Find the corresponding z-value to use for a proportion with a 95% confidence level. Construct the 95% confidence interval for the proportion of households represented in a town meeting.
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