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Question: Physical Sciences The U.S. Geological Survey collects water-level measurement data from various locations. Data from the La Pine Basin, Oregon, are being used to study changes in the water table. Twelve days were randomly selected, and the water table in feet below land surface on each day is given in the following table
Is there any evidence to suggest the mean water table is less than 12.4 feet? Assume the underlying distribution is normal, σ = 0.07 and use a = 0.025.
45 percent households say they would feel secure if they had $50,000 in savings. you randemly select 8 households and ask them if they would feel secure if they had $50000in savings
Please complete this Lab by the end of the class period and submit your answers on Blackboard. This assignment may be completed either as individuals or small groups. In you analysis please make sure your work is your own. Do not copy and paste..
Suppose that we want to estimate what proportions of all drivers exceed the legal speed limit on a certain stretch of road between Los Angeles and Bakersfield. Use the formula of Exercise 12 to determine how large a sample we will need to be at le..
In this group four were African American, 6 were hispanic, and one was Asian. Was this a good sample on which to norm this test? why or why not? What are your suggestions?
Canadians found that 58% were satisfied with the service provided by the dealer from which they bought their car. The sampling variability associated with these statistics is?
Suppose there are two vendors and each provides 50% of the items. The lifetime (in days) of an item from the first vendor is Exp(.1), and that from the second vendor is Exp(.08). Compute the probability that a randomly picked item will last more t..
At the 5% significance level, if the sample proportion is .45, and the standard error of the sample proportion is .035, the appropriate conclusion would be:
Complete this exercise by hand. A famous brand-name manufacturer wants to know whether people prefer Nibbles or Wribbles. They sample each type of cracker and indicate their like or dislike on a scale from 1 to 10. Which do they like the most?
The distribution under the normal curve can be seen a lot in society, although you may not even notice it. Have you been watching the presidential candidate.
What is the difference between inflation and opportunity cost? In carrying out economic analysis, why is it useful to only use amounts that have been corrected for inflation?
A local TV network wants to run an informal survey of individuals who exit from a local voting station to ascertain early results on a proposal to raise funds to move the city-owned historical museum to a new location. How might the network sampl..
For best outcome, you should elaborate your responses to the all questions with clearly demonstrated process and correct application of statistical methods.
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