A survey of 1000 college seniors working towards an undergraduate degree was conducted. Each student was asked, “Are you planning or not planning to pursue a graduate degree?” Of the 1000 surveyed, 652 stated that they were planning to pursue a graduate degree. a) Construct and interpret a 96% confidence interval for the proportion of college seniors who are planning to pursue a graduate degree. b) Find the minimum sample size would be needed for a 90% confidence interval with the margin of error of 0.025

Find the area under the standard normal curve to the right of  z = – 1.78.

A recent study claimed that less than 15% of middle school students are overweight.  In a random sample of 160 middle school students, 18 were found to be overweight.  At

A doctor of a local hospital is interested in estimating the birth weight of infants.  How large a sample must she select if she desired to be 98% confident that her estimate is within 2 ounces of the true mean?  Assume that the standard deviation is 7 ounces based on earlier studies.

A doctor of a local hospital is interested in estimating the birth weight of infants.  How large a sample must she select if she desired to be 96% confident that her estimate is within 2.5 ounces of the true mean?  Assume that the standard deviation is 7 ounces based on earlier studies.

The gray rectangle in the figure above represents a region of uniform magnetic field directed out of the page. A square loop of wire of side is in the plane of the page and is pulled at constant speed v through the field. Which of the following could show the current in the loop as a function of the position of the right edge of the loop?

The figure shows three objects (X, Y and Z) that have charges , , and , respectively. The objects are held on a fixed axis positioned shown. The magnitude of the electrostatic force exerted by object Y on object Z is . What is the magnitude of the net electrostatic force exerted on object Y due to the other two objects? On the left, X of charge negative 4q at position negative a, at center Y of charge positive q at position zero, and on the right Z of charge negative q at position a.

A beam of light with a wavelength of 500 nm falls normally on a diffraction grating. What is the spacing between slits on the grating if a first order maximum is observed at 30°?

Two metal bars with the same length and same cross-sectional area are placed between two tanks with temperatures of 400 K and 300 K. The thermal conductivity of the top bar is 200 W/mK. if the net energy transferred through the top bar in a given time interval is , what is the net energy transferred through the bottom bar during the same time interval? The left tank is at 400 Kelvin and the right tank is at 300 Kelvin. The top bar is labeled A with thermal conductivity k equals 200 watts per meter-kelvin, and the bottom bar is labeled B with k equals 400 watts per meter-kelvin.

The frequency of a photon with an energy of  is: