Answer:
When there are two answers all you have to do is click the crown.
Step-by-step explanation:
Please mark as brainliest lol
sorry what?
Step-by-step explanation:
I Don't understand
a. In order for to be a PDF, needs to be non-negative (it is) and the integral over its support must evaluate to 1. is symmetric about , i.e. even, so
and so is indeed a PDF.
b. Let be a random variable with as its PDF. Then
The integrand is odd, so the integral vanishes and the mean is .
The variance of is
The second moment is
This integrand is even, so
Integrate by parts, taking
so that
Integrate by parts again, this time with
and so the variance is .
The statement is correct because if you were to take a protractor to each corner, it will measure exactly 90°