Mean and standard deviation
Given independent random variables with the means and standard deviations below, find the mean and standard deviation of the following random variable: X+2Y
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An object 5.00 mm tall is placed 6.00 cm to the left of a converging lens of focal length 20.0 cm. a) How far away from the lens is the image formed?
A study of 24 graduates of four-year colleges revealed the mean amount owed by a student in student loans was $14,381. The standard deviation of the sample was $1,892. Construct and explain a 90% confidence interval estimate of the population mean
On the screen, the red light with a wavelength of 688 nm is separated from the violet light with a wavelength of 391 nm by 6.60 mm. What is the separation of the two slits?
For which wavelength in the visible spectrum do you expect constructive interference for reflection at normal incidence? (Let the visible spectrum be 400-720 nm.)
The eyepiece of a microscope has a focal length of 1.25 cm and the objective lens focal length is 1.49 cm. (a) If the tube length is 22.0 cm, what is the angular magnification of the microscope?
The American Veterinary Association claims that the annual cost of medical care for dogs averages $100 with a standard deviation of $30. For cats it averages $120 with a standard deviation of $35. What is the expected difference in the cost of med
Finally, sketch a fourth wave of amplitude 2 cm in phase with the first two waves. Use the sketches to aid answering the following questions.(a) What is the amplitude of the sum of these waves?
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