3. Suppose it is known that the proportion of students who get an A in a particular statistics course follows a beta distribution with a = 5 and 3 = 2, having probability density function f(x): = I(a + B) T(0)T(3) *ª—¹(1 − x)³-1, 0 < x < 1. (a) Find the probability that more than half of the students will get an A in this class this semester. (b) On average, what proportion of students are expected to get an A in this class this semester? If you know the form for the expected value for a Beta random variable, you do not need to reprove it.

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3. Suppose it is known that the proportion of students who get an A in a particular statistics
course follows a beta distribution with a = 5 and 3 = 2, having probability density function
f(x) =
T(a + B)
T(a)(3)*
-xa-¹ (1-x)³-1, 0 < x < 1.
(a) Find the probability that more than half of the students will get an A in this class this
semester.
(b) On average, what proportion of students are expected to get an A in this class this
semester? If you know the form for the expected value for a Beta random variable, you
do not need to reprove it.
Transcribed Image Text:3. Suppose it is known that the proportion of students who get an A in a particular statistics course follows a beta distribution with a = 5 and 3 = 2, having probability density function f(x) = T(a + B) T(a)(3)* -xa-¹ (1-x)³-1, 0 < x < 1. (a) Find the probability that more than half of the students will get an A in this class this semester. (b) On average, what proportion of students are expected to get an A in this class this semester? If you know the form for the expected value for a Beta random variable, you do not need to reprove it.
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