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# Tutor profile: Samuel O.

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Samuel O.
Tutor for 4 years, PhD Research assistant at UT Dallas
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## Questions

### Subject:Python Programming

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Question:

What is a dictionary.

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Samuel O.

A dictionary is pythons implementation of a hash table. It enables you to store information in key-value pairs and allows access to the "values" using the "keys". eg dict = {"Name":"Samuel", "Age": 23} name = dict["Name"] name now holds the value "Samuel"

### Subject:Calculus

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Question:

What is optimization in calculus.

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Samuel O.

This is the process of finding the location global minimum or maximum of a function of some independent variable(x) i.e. the x value where max(f(x)) or min(f(x)) exists. One important step towards finding this is taking the derivative of f(x) and equating it to zero.

### Subject:Statistics

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Question:

What is Bayes law

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Samuel O.

This is a statistical law that relates the joint probability of two events with the condition probability of one event on the other. It it given as: p(a,b) = p(a|b)p(b) = p(b|a)p(a) or more popularly p(a|b) = p(b|a)p(a)/p(b)

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