Developers wants to invest a chain of fast-food restaurants

Assignment Help Physics

Reference no: EM13540313

A group of developers wants to invest a chain of fast-food restaurants. In determining potential costs for each facility, they must consider among other expenses, the median monthly electric bill. They decide to sample some fast food restaurants currently operating to estimate the monthly cost of electricity. They want to be 90% condfident of their results and want the error of the interval estimate to be no more than $100. They estimate that such bills range from$600 to $2500. How large a sample should they take?

Note: There is a rule of thumb that says the standard deriation can be estimated as a quarter of the range.

Reference no: EM13540313

Questions Cloud

Find the temperature of rigels surface : What is the surface temperature of Betelgeuse, a red giant star in the constellation of Orion, which radiates with a peak wavelength of about 970 nm? Rigel, a bluish-white star in Orion, radiates with a peak wavelength of 145 nm. Find the temperature..

Fuel could be transformed to kinetic energy of the spaceship : A spaceship of mass 2.00 106 kg is to be accelerated to a speed of 0.820c. What minimum amount of energy does this acceleration require from the spaceship's fuel, assuming perfect efficiency?

Determine the speed of the faster spaceship : The proper length of one spaceship is three times that of another. The two spaceships are traveling in the same direction and, while both are passing overhead, an Earth observer measures the two spaceships to have the same length. If the slower space..

What is the path difference-a pair of slits : A pair of slits, separated by 0.160 mm, is illuminated by light having a wavelength of ? = 566 nm. An interference pattern is observed on a screen 150 cm from the slits. Consider a point on the screen located at y = 1.90 cm from the central maxim..

Developers wants to invest a chain of fast-food restaurants : A group of developers wants to invest a chain of fast-food restaurants. In determining potential costs for each facility, they must consider among other expenses, the median monthly electric bill. They decide to sample some fast food restaurants c..

A hydrogen atom emits a photon that has momentum : A hydrogen atom emits a photon that has momentum 0.6592 × 10-27 kg·m/s. This photon is emitted because the electron in the atom falls from a higher energy level into the n = 3 level. What is the quantum number of the level from which the electron fal..

Final image is to be located between the lenses : Two converging lenses having focal lengths of 12.0 cm and 22.0 cm are placed 50 cm apart, as shown in the figure below. The final image is to be located between the lenses, at the position indicated.

What is the wavelength of the scattered photon : A photon with a wavelength of 5.70e-11 m is scattered by a loosely bound electron in a metallic target and exits at an angle of 135° from its original direction. What is the wavelength of the scattered photon?

Determine the minimum non-zero thickness of the oil film : A glass plate (n = 1.60) is covered with a thin, uniform layer of oil (n = 1.29). A light beam of variable wavelength from air is incident normally on the oil surface. Observation of the reflected beam shows constructive interference at 511 nm. Deter..

User Account

All Pages