Estimating the population proportion
If you want to be 95% confident of the estimating the population proportion to in a sampling error of ±0.05, what sample size is required?
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Assume that the study was based upon 500 small business owners. Develop 95% confidence interval estimate for the population proportion of small business owners who never check in on office when on vacation.
The mass to use in the expression is the effective mass μ=mAmB /(mA+mB),where mA and mB are the masses of the individual atoms for the vibration frequency of a diatomic molecule.
The runner completes 6 1/2 laps around a 400m track all through 12 min. (720s) run test. Compute the given quantities: i) The displacement of runners at the end of 12 min.
The wooden artifact from the ancient tomb contains 30 percent of carbon-14 which is present in living trees. How long ago was artifact made? Half-life of carbon-14 is 5730 years.
A series combination of a resistor of 12 k and an unknown capacitor is joined to a 11 V battery. One second after the circuit is completed; the voltage across the capacitor is 9 V. Find out the capacitance of the capacitor.
A cord of mass of 0.65 kg is stretched among the two supports 28 m apart. When the tension in the cord is 150 N, determine how long will it take a pulse to travel from one support to another?
The 1985 Mexico City eqrthquake had the magnitude of 8.1 on Richter scale. 1976 earthquake in Tangshan, China, was 1.26 times as intense. Determine magnitude of Tangshan eqrthquake?
An orienteer runs north at 5m/s for 120s and then west at 4m/s for 180s. Give a graphic solution to illustrate the orienteer’s resulting displacement.
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Its key advantage is high internal validity; its disadvantage is that randomization is often ethically or practically impossible.
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