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There are several methods used by people to organize their lives in terms of keeping track of appointments, meetings, and deadlines. Some of these include using a desk calendar, using informal notes of scrap paper, keeping them ″in your head″, using a day planner, and keeping a formal″ to do list. Suppose a business researcher wants to test the hypothesis that a greater proportion of marketing managers keep track of such obligations ″in their head″ than do accountants. To test this, a business researcher samples 400 marketing managers and 450 accountants. Of those sampled, 220 marketing managers keep track ″in their head″ while 216 of the accountants do so. Using a 1% level of significance, what does the business researcher find?
Find the z-score to make a conclusion.
Round the answer to two decimal places.
Find observed Z and whether to reject or fail to reject.
Find the equation of the circle that has its center at the focus of the parabola X^2 - 4x + 6y - 20 = 0 and that is tangent to the parabola at its vertex. Also sketch both curves.
Find an example online of a graph used in real life. Please provide the link to the web page by using the link button in the editor. Describe at least one mathematical feature of the graph
It is known that 20% of old cars cannot pass the emission test . Four old cars are selected randomly . x is the number of card in the sample that cannot pass the emission test.
Find the values of f(x) at which each of the following functions is discontinuous. Why is the function discontinuous at that value?
Illustrate the positions of Jill and John at 3:00pm. (I calculated that Jill would be 90 miles away and John would be 75 miles away) Find the measure of the angle between their routes. I calculated this angle to be 65 degrees. Is this correct?
Quadratic Equation - Cancellation Round-off Error - Numerical Analysis - Looking for Solution Confirmation Using (2), x1 = (11.01 - 11.0077) / (2 * 1.002) = 0.0012
A patient is being treated with laser therapy to remove a tumour that is located behind a vital organ. The tumor is 5.7 cm below the skin. To avoid the organ, the entry point of the laser must be 12.4 cm above the tumour along the skin.
Draw a scalene triangle and label the vertices ,A,B and C. Place the compass at point B and draw an arc that intersect line segment AC in two points. Label the points of intersection D and E.
You are given a list of n names (all of the names are distinct) with instructions to put them in alphabetical order. How many comparisons are necessary to accomplish your task?
Tom and Jim decided to play the following game for points. A single die is rolled. If it shows a non-prime number, Tom receives points equal to two times the number of dots showing
How many times does the graph of a quadratic equation (a parabola) cross the x-axis? I know that the graph of a quadratic equation should cross the x-axis 2 times, because the polynomial equation of second degree should have two roots, however if ..
What is the probability that a part that starts in Process A will make it to shipping in two steps? Show the values that you are combining to solve this.
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