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Many companies that manufacture lightbulbs advertise their 60-watt bulbs as having an average burn time of 1000 hours. A cynical consumer bought 30 bulbs and burned them until they failed. He found that they burned for an average of M = 1233, with a standard deviation of s = 232.06. Perform all six steps of hypothesis testing to determine whether the burn time of lightbulbs differs from that claimed by companies manufacturing them.
select a quadratic equation and solve it using the completing the square method. show your work in full
63 percent of men consider themselves basketball fans. You randomly select 10 men and ask each if he considers himself a basketball fan. Find the probability that the number who consider themselves basketball fans is (a) exactly eight, (b) at leas..
A 140 ft tower is located on the side of a mountain that is inclined 32° to the horizontal. A guy wire is to be attached to the top of the tower and anchored at a point 55 ft downhill from the base of the tower. Find the shortest length of wire ne..
The bucket is filled with 43 pounds of water and is pulled up at a rate of 2.8 feet per second, but water leaks out of a hole in the bucket at a rate of 0.15 pounds per second. Find the work done pulling the bucket to the top of the well. Your ans..
A biologist took a count of the number of migrating geese in a state park and recounted the park's population of geese for each of the next six weeks.
Suppose the demand curve for a monopolist is QD = 500 - P, and the marginal revenue function is MR = 500 - 2Q. The monopolist has a constant marginal and average total of $50 per unit.
on friday, you drove 145 miles to stay at your grandmother's house. on sunday, you return home and calcuated that the round trip travel time was 5 hours. What was your average speed.
Probability density function sample question, Let E be the event that the number which comes up when a single die is tossed is divisible by 3. Let X be the number of times that event E occurs in 3 tosses of the die
chlorine residual is desired,how many kgs of chlorine per day are required for a flow of 1000 cubic meters per hour
think of one linear function and one quadratic in the business world. for both functions justify them by finding the
Four congruent quarters circle are drawn inside square of side length four centimeters f ind the shaded area
A walkway forms the diagonal of a square playground. The walkway is 14in long. To the nearest tenth of a Meter, how long is a side of the playground?
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