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An initially motionless car of mass 1000 kg slides down from a height 40 m on a frictionless roller coaster track. It enters a circular vertical loop-the-loop of radius 10 m. What acceleration does a passenger feel at the bottom of the loop just as the curvature starts?
a) 5g
b) 7g
c) 9g
d) 11g
e) 13g
Consider the experiment of a worker assembling a product. a. Define a random variable that represents the time in minutes required to assemble the product.
Repeat part (a), but with an interaction term included. Interpreting the R2 value, to what extent has inclusion of the interaction term improved the model's explanatory power?
Let A and B be two events such that P (A) = 0.6, P (B) = 0.4, P (AB) = 0.2. (a) What is the probability that neither of the two events occurs.
Assume the random variable x is normally distributed with mean mu = 85 and standard deviation sigma =4. Find the indicated probability. P(x
A financial analyst is interested in comparing the turnover rates, in percent, for shares of oil-related stocks versus other stocks, such as GE and IBM. She selected 32 oil-related stocks and 49 other stocks.
If the manufacturer wants to keep the mean at 12.8 ounces but adjust the standard deviation so that only 2% of the bags weigh less than 12 ounces, how small must that standard deviation be?
You will investigate four different scenarios of population growth also decline in this town. Graph the model as well as investigate it by four different growth models.
What is the expected shortfall at the end of the week? That is, what is the expected number of demands in excess of the initial stock?
A new manufacturing procedure has been proposed to reduce the amount of aluminum that must be recycled in this way. For a sample of 35 castings made with the new process, data file XR10111 lists the weights of aluminum trimmed and recycled. Base..
A normal population has a mean of 60 and a standard deviation of 3. You select a sample of 36. Compute the probability the sample mean is (Round z values to 2 decimal places and final answers to 4 decimal places):
in terms of the mean and standard deviation- what does it mean to say that a particular value of x has a standard score
a) T- shirts at a store: price each, number sold. b) Real estate: house price, house size (square footage). c) Economics: Interest rates, number of mortgage applications. d) Employees: Salary, years of experience.
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