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The graduate program director in the Faculty of Education at Brock wanted to developa demographic profile of the Ph.D. candidates in the faculty. Where age is concerned, herresearch assistant calculated a mean of 30 years with a standard deviation of 2 years.
Assuming the distribution of doctoral students' ages are normally distributed, what percentage of candidates in the program:
(a) are older than 35 years of age?
(b) are younger than 27 years of age?
(c) are between 25 and 29 years?
(d) are between 32 and 34 years?
(e) Suppose there are 78 students in the Ph.D. programme; for questions 7. a, b, c, & d above, indicate the exact number of students who would fall beyond or between the designated ages/scores.
A sample of 300 is taken and the sample mean is computed to be 7.65 and the sample standard deviation is 5. Assume the data is ratio level.
Persons taking a 30-hour review course to prepare for a standardized exam average a score of 620 on that exam. Persons taking a 70-hour review course average a score of 797. Find a linear function S(t), which fits this data, and which expresses sc..
What statistical analysis will test for this, plus one other variable on a skill the teachers were supposed to learn?
during the first part of a trip, a canoeist travels 83 miles at a certain speed. the canoeist travels 25 miles on the second part of the trip at a speed of 5 mph slower. the total time for the trip is 3 hrs. What was the speed on each part of the ..
An observer to a rocket launch was 1800 feet from takeoff position. The observer found the angle of elevation of the rocket as a function of time to be theta=3t/(2t+5).
Find the work required to empty the tank by pumping the hot chocolate over the top of the tank. Note: the density of hot chocolate is delta = 1500 kg/m^3
arest tenth of a cubic inch, how much volume is added to a spherical balloon whose radius grows from 10 to 20 inches long?
Construct a k-form on S^k with nonzero integral. [Hint: Construct a compactly supported k-form in R^k with nonzero integral, and project stereo graphically.]
A chemist has two solutions of HNO3. One has a 40% concentration and the other has a 25% concentration. How many liters of each solution must be mixed to obtain 76 liters of a 28% solution?
Find how much radioactive material remains after 7 hours. Round your answer to the nearest thousandth.
Bob owns a watch repair shop. He has found that the cost of operating his shop is given by C(x) = 4x2-296x+85 , where c is cost and x is the number of watches repaired. How many watches must he repair to have the lowest cost?
Electric Depot sells boxes of high efficiency light bulbs ($6 box) and switch plates ($12 each). In May, total sales were $42,000. Customers bought 5 times as many boxes of light bulbs as switch plates. How many of each did Electric Depot sell.
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