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A university dean of students wishes to estimate the average number of hours students spend doing homework per week. the standard deviation from a previous study is 6.2 hours. how large a sample must be selected if he wants to be 99% confident of finding whether the true mean differs from the sample mean by 1.5 hours.
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Helena lost her marbles. but then she found them and put them in 44 bags with mm marbles in each bag. she had 33 marbles left over that didn't fit in the bags.
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Abox holds 500 paperclips. after a week on the teacher's desk 239 paperclips remained. how many paperclips were used?
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Find the power set of each of these sets, where a and b are distinct elements. a) {a} b) {a, b} c) {1, 2, 3, 4} show steps
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A university dean of students wishes to estimate the average number of hours students spend doing ho...
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