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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.
an object is launched vertically down into an unknown liquid. the initial velocity is 60.0 ms. the drag causes the
A ray of sunlight is passing from diamond into crown glass; the angle of incidence is 28.90 degrees. The indices of refraction for the blue and red components of the ray are: blue (n diamond=2.444, n crown glass=1.531), and red (n diamond=2.410, n..
Two narrow slits 41 µm apart are illuminated with light of a wavelength 604 nm. What is the angle of the m=3 bright fringe in degrees.
Two light sources are used in a photoelectric experiment to determine the work function for a particular metal surface. What stopping potential would be observed when using light from a red lamp (?=668.0nm)
an electron moving horizontally at a velocity of 2.3x10^7 m/s enters a region with an electric field of magnitude E=52600 V/m in the same direction. How far in meters will the electron travel before it turns around
a car is traveling at 61.04 mph. the driver applies the brakes and the car decelerates at 1.97 ms2. what is the
Suppose that the net horizontal force is as a result of rolling friction only and take the free-fall acceleration to be g = 9.80 m/s^2.
Two steel juggling balls each carry a charge of 2.75 %u03BCC. What is the distance between the centers of the two balls?
A dentist's mirror is placed 2.4 cm from a tooth. The enlarged image is located 6.4 cm behind the mirror. How is the image oriented relative to the object
A 2 meter tall basketball player wants to make a goal from 10 meter from the basket. Evaluate what is the initial speed of the basketball
A rifle with a weight of 35 N fires a 5.0-g bullet with a speed of 250 m/s, If a 675-N man holds the rifle firmly against his shoulder, find the recoil speed of the man and rifle
Rubidium atoms are cooled to 0.22 uK in an atom trap. What is their de Broglie wavelength
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