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Write a response to the following questions. Write you responses in complete sentences. Brief or incomplete answers will not be given credit. Your answers to the questions are due on Wednesday, by midnight. Your response to at least two other people are due on Saturday, by midnight. Responding to more than two people will ensure the highest grade in the discussion board. Responses should be more than I agree or I disagree. 1. In the following observational studies, describe changes that could be made to the data collection process that would result in an experiment rather than an observation study. Also, offer suggestions about unseen biases or lurking variables that my be present in the studies as they are describe here. a. In a sample of 50 members of a local health club you find that 12 of these members meet weekly with a physical fitness trainer and that the average body mass index (BMI) of these 12 members is less than the average BMI of the other 38 club members in your sample. b. In a sample of 12 bank tellers at a local branch office, the 7 tellers who have completed the advanced training program offered by the bank have a lower average error rate in the processing of transactions than the remaining 5 tellers.
When an object is placed at a distance p from a convex lens having focal length 9 cms, the the image will be at a distance q from the lens while (1/9)= (1/p) + (1/q), find the rate of change.
In recession, congress decided to stimulate the economy by providing funds to hire unemployed workers for gov. projects. Suppose the t months after the stimulus programs have begun, there are N(t) thousand people unemployed, where:
Given three points, there is one line that can be drawn through them if the points are colinear. If the three points are noncolinear,there are three lines that can be drawn through pairs of points.
A cylindrical drill with radius 2 is used to bore a hole throught the center of a sphere of radius 7. Find the volume of the ring shaped solid that remains using polar coordinates.
weightw 15000 lb wing area s 230 ft2 altitude sea level temperature standard aoa at stall 20 degrees.what is the
A student and a professor each choose a number between 1 and 5 (1 and 5 are both possible choices). What is the probability that the two choose the same number?
find the volume of the solid lying under the elliptic paraboloid x^2/4+y^2/9+z=1 and above the rectangle R = [-1,1]x[-2,2]
The length of an object is 3 times with the following results. 6.145cm, 6.12cm, and 6.2 cm . If the acutal value of the length is 6.11 cm , find the percent error between the average meansurement and the acutal value. Show all work.
Find the gradient of the function and the maximum value of the directional derivative at the indicated point:
where k is a constant and R is the radius of the artery. How many centimeters from the central axis of the artery is velocity of blood maximized?
Suppose that ydx + (yx^2-x)dy = 0 has an integrating factor that is a function of x alone [i.i., mu = mu(x)]. Find the integrating factor and use it to solve the differential equation.
Suppose that you select 3 cards without replacement from an ordinary deck of playing cards. If the first card that you select is a spade and the second is a heart, what is the probability that the third card that you select is a spade?
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