Cups of coffee
A vending machine distributor wants to be 99.5% confident that coffee machine is dispensing correct amount of coffee to in 0.15 fluid ounces. If it is know that the standard deviation is 0.32 fluid ounces, how many cups of coffee should be measured?
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Produce well-labeled sketch of this normal distribution. Find out the z-score corresponding to 55,000 miles.
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The average number of miles that 80 truckers drove in a day was 550 with a standard deviation of 50 miles. What is the 99.5% confidence interval of the true mean number of miles, m, driven by all truckers?
A vending machine distributor wants to be 99.5% confident that coffee machine is dispensing correct amount of coffee to in 0.15 fluid ounces. If it is know that the standard deviation is 0.32 fluid ounces, how many cups of coffee should be measure
If original concentration of salt in tank is 2 pounds per gallon, and pure water is being added at the rate of two gallons per minute, how much salt (in pounds) is in tank after twelve minutes?
The capacior of 1F and resistor of 20 ohms are linked in series with the electromotive force E(T)=10e^{-.01t} If charge on capacitor is zero at t=0, then determine maximum charge on capicator and when it happens.
The average cost of living for a family of 4 in twelve different cities was found to be $65,351 with a standard deviation of $7711. In dollars, what is a 95% confidence interval for the true mean, m?
Pick five cards randomly from an ordinary deck of 52 cards. Find the probability that all come from the same suit.
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