Confidence interval of the mean
A study found that the average time it took a person to find a new job was 3.5 months. If a sample of 30 job seekers was surveyed, find the 90% confidence interval of the mean. Assume the standard deviation of the sample is 0.5 month.
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How much work does the electric field do in moving a proton from a point with a potential of +130 V to a point where it is -45 V? Express your answer in joules.
In a chemical reaction, the products have a lower potentialenergy than thereactants. This reaction must have a negative (1) DG; (2) DS; (3) DH; (4)DX. Can you explain why?
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Find the maximum tangential stress, maximum radial stress and maximum shear stress assuming no grinding load and a material with v = 0.2.
If a chemist produced 926.77 g. of zinc sulfide at the end of the experiment, what mass of zinc was initially placed into the reaction chamber?
How many hours are required in order to reduce 325 mL of a 0.481 M solution of CuCl2 to 0.226 M in 0.226 M in Cu2+ using a 0.978 A current
A soccer player kicks the ball toward a goal that is 27.0 m in front of him. The ball leaves his foot at a speed of 19.3 m/s and an angle of 32.4 degrees above the ground. Find the speed of the ball when the goalie catches it in front of the net.
The statistical procedure ensures that the alpha level for any given planned contrast will not exceed .05 is
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