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- General Questions (41)

**Answered: If $a = 3$, then what is the value of $7 + 5a$ ?***Posted on Tuesday October 19, 2021*

$\textbf{Answer:}$

$22$

$\textbf{Explanation:}$

we need to substitute in $a=3$ into $7+5a$

$ \implies 7+5a$

$ = 7+5(3)$

$ = 22$

**Answered: Let \(X\) be a continuous random variable with p.d.f: \[ f(x)= \begin{cases}a x, & 0**

**Answered: What is a dummy variable?***Posted on Saturday October 16, 2021*

A device used in a multivariable regression model to describe a categorical predictor without assuming a numeric scoring. Indicator variable might be a better term. For example, treatments \(A,...

Click Here To Read More.**Answered: Why should a machine learning model be good at discrimination?***Posted on Saturday October 16, 2021*

A variable or model's discrimination ability is its ability to separate subjects having a low responses from subjects having high responses. One way to quantify discrimination is the ROC curve area.

Click Here To Read More.**Answered: What is detectable difference when determining treatment effect?***Posted on Saturday October 16, 2021*

The value of a true population treatment effect (difference between two treatments) that if held would result in a statistical test having exactly the desired power.

Click Here To Read More.
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