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DQ1 -Statistical studies are often represented. Summarize in your own words the 10 Guiding Principles from page 720 to help you when reading statistical studies. DQ2- Ex. 17.16, Find an example of an observational study in the news and answer the following questions. Include a reference to your article. a. Explain why it fits the definition of an observational study rather than a randomized experiment b. Describe an explanatory and response variable considered in the study c. Using the variables in part (b), give an example of a possible confounding variable and explain why it fits the definition of a confounding variable d. Write two headlines to accompany the study, one that is correct and one that implies a conclusion that is not justified. Explain which is which and why. (You may use the actual headline of the story as one of those). DQ3 - Ex. S5.1, Visit the websites of one or more professional organizations related to your major. Find one that has a code of ethics. Describe whether the code includes anything about research methods. If not, explain why you think nothing is included. If so, briefly summarize what is included. Include the website address with your answer. DQ4 - Identify any ethical issues with the way the data for your project was collected or reported. How could the issues, if any, be addressed?
The person is a constant 93 feet away from the balloon's starting point and the angle that the rope makes with the ground increases at a rate of 0.01 radians/minute. How fast is the balloon rising when the angle is 0.6 radians?
Calculate the amount earned by a principal.
A rectangular table is two times as long as it is wide. If the area is 17ft^2, find the length and the width of the table.
1. what is a sequence? provide an example with your explanation.2. what is a sequence for? give an example of a
the height of a ball thrown by a child is given by:-1/12x2+2x+4where x is the horizontal distance from the point at which the ball is thrown. What is the maximum height of the ball?
John has 15 more chocolate bars than Rick. Cathy has 9 times as many chocolate bars as John. If Rick has r chocolate bars, which equation below represents how many chocolate bars Cathy has, c?
In a forest planted in a certain type of pine trees with a height of 1.7 m. For they are 15 years old, grows trees with a height 17.3% per year.
We have defined space X to be contractible in two ways: Show that these two definitions are equivalent.
Let A and B be subsets of a universal set U and suppose n(U) = 360, n(A) = 140, n(B) = 70, and n(A B) = 40. Find the number of elements in the set.
The gestation time for human babies is assumed to be normally distributed with a mean of 278 days and a standard deviation of 12 days. What happens to the standard deviation of the sampling distribution of the sample mean as n increases?
Suppose that 646 ft of fencing is used to enclose a corral in the shape of a rectangle with a semicircle whose diameter is a side of the rectangle. Find the dimensions of the corral with maximum area (in terms of x and y)
An archer has probability 0.3 of hitting a certain target. What is the probability of hitting the target exactly two times in four attempts?
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