Confidence interval for the population mean cost
A random sample of 55 standard hotel rooms in the Philadelphia, PA area has a mean nightly cost of $154.17 and a standard deviation of $38.60. Construct a 99% confidence interval for the population mean cost.
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What are the requirements that must be met for a regression analysis? How is the analysis affected if these requirements are violated ("The test won't work or be valid" is not an acceptable answer)?
Describe some benchmarking performance metrics for the airline industry.
At a point P, the electric field is 71 N/C at 22 degrees clockwise from the positive x axis. A particle of mass 1.5 kg and charge 0.17 C is located at P. Find:the magnitude of the force on the particle: N,the direction of the force on the particle,pa
The marketing manager of a larger supermarket chain would like to use shelf space to predict the sales of pet food. A random sample of 12 equal-sized stores is selected, with the following results. Construct a scatter plot. For these data, bo=145 a
Is the average run length performance of a control chart a more meaningful measure of performance than the type I and type II error probabilities? What information does ARL convey that the statistical error probabilities do not?
Use the least squares method to develop the estimated regression equation. Use the estimated regression equation to predict the rating for an ellipitical trainer witha price of $1500.
Consider two random variables with standard deviations equal to 1.5 and 2.1. The standard deviation of the average of these two variables is equal to 1.7. The covariance is then equal to:
On a sphere with radius a there is an electric charche sigma=sigmazero*cos(theta). Determine the electrostatic potential for all points on the z-axis. (solve with integral over R^3 dV* chargedistribution* Greensfunction).
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