Confidence interval of the true mean number
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?
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What is the critical value she should use? What's the p-value for the appropriate test? If she changes the ?-level, which of the following will change: the test statistic, the critical value, and/or the p-value? Explain your choice(s).
Produce well-labeled sketch of this normal distribution. Find out the z-score corresponding to 55,000 miles.
Rate of infection is proportional to number of uninfected individuals. Determine the equation for number of infected individuals.
A random sample of 100 voters chosen from large population revealed 30 favoring candidate A, 38 favoring candidate B, and 32 favoring candidate C. Find MLEs for the proportions of voters in the population favoring candidates A,B, and C, respective
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?
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