Calculate a bound on the error of estimation
From these data, estimate the average height of all adults and calculate a bound on the error of estimation (assume that approximately 50% of adults are male).
male: n=20, mean=69.30, variance=2.812
female: n=20, mean=64.95, variance=2.929
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Gene and Dixie, husband and wife (ages 45 and 42), both work. They have an adjusted gross income of $50,000 in 2012, and they are filing a joint income tax return. Both have an employer-provided retirement plan at work.
The muddy surface on which the car's tires rest exerts negligible friction forces on them. What is the tension in the tow cable?
Assume the barrel is initially at rest and that its moment of inertia can be approximated as a hollow cylinder rotating about its axis: Icylinder = MR2. Your answer should be given to a tenth of a m/s.
Lindsay Brown owns a risky portfolio with a 15% expected return. The riskfree return is 5%. What is the expected return on Lindsay's total portfolio if Lindsay invests the following proportions in the risky portfolio and the remainder in the risk
Happy Buker owns a risky portfolio with a 20% standard deviation. If Happy invests the following proportions in the riskfree asset and the remainder in the risky portfolio, what is the standard deviation of Happy's total portfolio?
Now the group is 4500 people and 1000 of them are left-handed. As before, eight of them are selected and X - the number of left-handed among 8 - is recorded.
With the present 70% capaciy production, what is the expected annual profit or loss for the susidiary plant? What annual volume of sales (units) is required in order for the plant to break even?
A turntable platter spinning at 78 rev/min comes to a complete stop in 29 s. Assuming constant acceleration, through what rotation angle does the platter move as it comes to rest? (Your answer should be given in radians and specified to a tenth of
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