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At a certain university, the average cost of books was $380 per student last semester and the population standard deviation was $90. This semester a sample of 40 students revealed an average cost of books of $405 per student. The Dean of Students believes that the costs are greater this semester. What is the test value for this hypothesis?
Calculate and interpret the coefficient of determination
For each of the described curves, decide if the curve would be more easily given by a polar equation or a Cartesian equation. Then write an equation for the curve.
Graph y=sinx + cosx restricted to 0
Assume that the average annual salary for a worker in the United States is $28,500 and that the annual salaries for Americans are normally distributed with a standard deviation equal to $6,250. Find the following
Find probability of getting both of them are male republican
Quadratic equations may be solved by graphing, using the quadratic formula, completing the square, and factoring. What are the pros and cons of each of these methods? When might each method be most appropriate? Which method do you prefer? Explain ..
What is the probability that during a 5-minute interval no one will enter the store? What time interval is such that the probability is 1/2 that no one will enter the store during that interval?
A drug company believes that the annual demand for a drug will follow a normal random variable with a mean of 900 pounds and a standard deviation of 60 pounds.
Create a joint probability table
imeter of the rectangle is 310ft. the width is 35ft less than the length. Find the width and length of the rectangle.
One car is selected at random from the cars with vehicle tags from these cities, What is the probability that this car is from Salem?
Queuing Analysis explained in this solution. The Riverview Clinic has two general practitioners who see patients daily. An average of six patients arrive at the clinic per hour. Each doctor spends an average of 15 minutes with a patient.
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