Confidence the margin of error
The manager of a grocery store wants to determine what proportion of people who enter his store are his regular customers. What size sample should he take so that at 97% confidence the margin of error will not be more than 0.1?
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What factors contributed to the growth of the 12 cities discussed in book Gritty Cities between 1860 and 1920? What factors did the cities share and which ones were restricted to a subset of these Cities?
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Compute the porosity for rhombohedral packing of identical spheres.Answer is 25.96%... but how is this calculated?
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