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1. Select four variables, that could be measured by nominal, ordinal, interval, and ratio scale. Classify them by measurement scale and select a descriptive statistic that can be used to summarize data. Use the following table when posting your response:
Variable Level of Measurement Descriptive StatisticNominalOrdinalIntervalRatio
2. Suppose an advertisement reported that the mean weight loss after using a certain exercise machine for 2 months was 10 pounds. You investigate further and discover that the median weight loss was 3 pounds.
a. Explain whether it is most likely that the weight losses were skewed to the right, skewed to the left, or symmetric.
b. As a consumer trying to decide whether to buy this exercise machine, would it have been more useful for the company to give you the mean or the median? Explain.
When cars are equipped with flexible bumpers, they will bounce off each other during low-speed collisions, thus causing less damage. In one such accident, a 1850car traveling to the right at 1.40 collides with a 1400 car going to the left at 1.10 ..
Photons of wavelength 220nm impact on a metal target and liberate electrons with kinetic energies ranging from 0 to 61X10 to the -20 power J. Determine the cutoff wavelength
A dipole of moment 0.5 e·nm is placed in a uniform electric field with a magnitude of 9 104 N/C. What is the magnitude of the torque on the dipole
A playground merry-go-round ofradius 2.00 m has a moment of inertia I = 325 kgm2 and isrotating about a frictionless vertical axle. What is the angular speed of the system when the child reaches the edge
A cargo helicopter, descending steadily at a speed of 3.6 m/s, releases a small package. how long does it take for the package to reach the ground
If you are in a car accident with an initial speed of 119 km/h and you are stopped by an airbag that inflates from the dashboard, over what distance should the airbag stop you for you to survive the crash.
A rotating wheel needs 8.00 s to rotate 29.0 revolutions. Its angular velocity at the end of the 8.00 s interval is 100.0 rad/s. What is the constant angular acceleration of the wheel?
Three resistors, 21, 39, and 73 , are connected in series, determine the potential difference across the three resistors
The heels on a pair of woman's shoes have radii of 0.46 centimeter at the bottom. If 30% of the weight of a woman weighing 560 N is supported by each heel, calculate the stress on each heel
Mount McKinley (also called Denali) is the tallest mountain in North America, with a height of 6,200 m above sea level. how much work is done by gravity on the person
A person exerts a horizontal force of F = 169N in the test apparatus. (h = 0.32m.) Find the horizontal force M that his flexor muscle exerts on his fore arm.
Find the gravitational force that the Earth exerts on the Moon
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