06/01/20

ARIMA model, tools, diagnostic problem
Describe the diagnostic tools you would use to determine if your model is appropriate! What can we learn from these tools? Why do we care? Which tests are used to detect the diagnostic... more
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04/02/20

Statistics PDF question.
A random variable X has the pdf f(x) = kθ^k/ x^(k+1) , x ≥ θ,where k and θ are parameters, and > 0. This random variable is called Pareto random variable. (a) Sketch the graph of f(x). (b) Show... more
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02/23/20

If F(x) = f(g(x)), where f(2) = 7, f '(2) = 6, f '(0) = 4, g(0) = 2, and g'(0) = 7, find F '(0).
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02/23/20

Differentiate y = (r^2 − 6r)e^r
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02/23/20

If cos ⁡x=−1/2, and 90°<x<180°, find tan⁡(x+30°).
If cos ⁡x=−1/2, and 90°<x<180°, what is tan⁡(x+30°) in radical form?
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02/23/20

If sin⁡ x=2√2, and 90°<x<180°, what is tan⁡(x/2)?
If sin⁡ x=2√2, and 90°<x<180°, what is tan⁡(x/2)??
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02/23/20

Complement and Independent events.

Show that if A and B are independent events, then the pairs A and B', A' and B, A' and B' are also independent.How do I prove it?
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02/23/20

For a normal distribution, a. What z-score separates the highest 25% from the rest of the scores? b. what z-score separates the lowest 30% from the rest of the scores?

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