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A large discount store gives its sales personnel bonuses based on their average sale amount. Since each salesperson makes hundreds of sales each month, the store management decided to base average sale amount for each salesperson on a random sample of the person's sales. Since records of sales are kept in books, the use of systematic sampling is convenient. Suppose a salesperson has made 855 sales over the month, and management wants to choose a sample of 30 sales for estimation of the average amount of all sales. Suggest a way of doing this so that no problems would result due to the fact that 855 is not an integer multiple of 30. Give the first element you choose to select, and explain how the rest of the sample is obtained.
a 45-kg crate is placed on an inclined ramp. when the angle the ramp makes with the horizontal is increased to 30 ?
A truck is moving at 150 km/h and approaches a stationary policecar that has a radar speed detector operating at 15 GHz. What wil lbe the frequency change found by the speed detector?
Are any of the elements in given Figure in series or parallel? If so, identify the ones that are. Then if i1 = -5 mA, i2 = 10 mA, and i3 = -15 mA, find i4 and i5.
Under what condition is the cross product of two vectors of afixed magnitude maximum? what is the value of the vertical component of the velocity fora projectile at the top of its trajectory? what is the vector of acceleration foran object moving at ..
A microwave oven is powered with an electron tube called a magnetron, which generates electromagnetic waves of frequency2.75 GHz. The microwaves enter the oven and are reflected with the walls. The standing wave pattern produced in the oven can cook ..
A 0.2 kilogram toy car rolls down ramp and reaches a speed of 6 meter per second. Compute at what speed do the two cars move after the collision
A 60kg bicyclist rides his 7.8kg bicycle with a speed of 16m/s. How much work must be done by the brakes to bring the bike and rider to a stop.
A standard nuclear power plant generates 2.4GW of thermal power from the fission of 235U. Experiments show that, on average, 0.19 u of mass is lost in each fission of a 235U nucleus.
In a simple of the hydrogen atom, the electron revolves in a circular orbit around the proton with a speed of 1.1 x 106 m/s. Determine the radius of the electron's orbit
The earth orbits the sun in an approximately circular orbit of radius 1.496 X 10^11 m (about 93 million miles) in a period of 365 1/4 days. Use these data to determine the mass of the sun
Describe how magnetic dipoles of a system of two-state paramagnet behave in a magnetic field and explain why. Describe how the heat capacity, energy, and magnetization of a system of two-state paramagnet depend on temperature.
light rays in a material with index of refrection 1.25 can undergo total internal reflection when they strike the
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