Recent content by gummz

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    Diet consisting of only a few types of foods

    Haha I wouldn't have gone through with this without an expert's approval, which would have been my doctor in three weeks anyways. Thank you for your time!
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    Diet consisting of only a few types of foods

    Thinking of starting keto, and thought it would be fun to try and live off of coconut milk, low carbohydrate bread, butter, and some kind of meat or fish for dinner. Provided I take a multivitamin, along with calcium and magnesium pills, would this diet be as healthy as any other? Could I be...
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    Geometry What would a textbook on measure theory be called?

    I was quite distraught knowing that chegg.com has no textbook solutions for "measure theory" even though it has four for abstract algebra. Could it be that the textbooks are called something else?
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    Prove (Q+, *) is isomorphic to a proper subgroup of itself

    Thank you so much again fresh_42!
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    Prove (Q+, *) is isomorphic to a proper subgroup of itself

    Homework Statement Prove that Q+, the group of positive rational numbers under multiplication, is isomorphic to a proper subgroup of itself. Homework Equations None The Attempt at a Solution [/B] Not at all sure if this is legit. Let phi: Q+ --> G phi(x) = x2, x is in Q+ We will...
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    Group is a union of proper subgroups iff. it is non-cyclic

    Homework Statement Prove that a finite group is the union of proper subgroups if and only if the group is not cyclic. Homework Equations None The Attempt at a Solution [/B] " => " If the group, call it G, is a union of proper subgroups, then, for every subgroup, there is at least one...
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    Find possible subgroups given some elements

    Thanks for reply. But if we write out the notation, then, for group with operation "addition": 250 = 50*2, and 502=2*50, and Z is commutative? That is, in general, an=n*a
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    Find possible subgroups given some elements

    Homework Statement Suppose that H is a subgroup of Z under addition and that H contains 2^50 and 3^50. What are the possibilities for H? Homework Equations Relevant concepts are just the definitions for a group and subgroup. https://en.wikipedia.org/wiki/Group_(mathematics)...
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    My calculator's integration seems wrong

    That's it! Thank you so much George.
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    My calculator's integration seems wrong

    This is the integral: http://www.wolframalpha.com/input/?i=integrate+x%5E2%2Bxy%2F2+from+0+to+x+with+respect+to+y But my calculator (TI-nspire cx CAS) gets this: x*(2x^2+xy)/2 Any idea why this is?
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    Alpha Significance: Understanding & Analyzing Data Set

    Homework Statement What conclusions can be drawn from this data set? What assumptions are you making? Homework Equations http://i.imgur.com/M9YQGAF.png I hope this is legible. The Attempt at a Solution The solution is what I'm having trouble with. I just don't get how that test statistic has...
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    Normal Distrib Probability: P(X>130)

    I think I've figured it out, much like what you suggested. The sample was intentionally very inaccurate in one place (where it mattered for this exact question, but didn't matter that much as for the correlation to the normal distribution) to emphasize the effect of chance on random selection...
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    Normal Distrib Probability: P(X>130)

    To the best of my ability yes, I just call the sd(x) and mean(x) functions in R
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    Normal Distrib Probability: P(X>130)

    I was not given the values, I calculated them in R with the data set I was given.
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    Normal Distrib Probability: P(X>130)

    Oh, sorry I meant 0.022