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Solved: Parental Involvement In the following probability
Chapter 11, Problem 18AYU(choose chapter or problem)
Parental Involvement In the following probability distribution, the random variable X represents the number of activities a parent of a 6th- to 8th-grade student is involved in.
(a) Verify that this is a discrete probability distribution.
(b) Draw a probability histogram.
(c) Compute and interpret the mean of the random variable X.
(d) Compute the standard deviation of the random variable X.
(e) What is the probability that a randomly selected student has a parent involved in three activities?
(f) What is the probability that a randomly selected student has a parent involved in three or four activities?
Questions & Answers
QUESTION:
Parental Involvement In the following probability distribution, the random variable X represents the number of activities a parent of a 6th- to 8th-grade student is involved in.
(a) Verify that this is a discrete probability distribution.
(b) Draw a probability histogram.
(c) Compute and interpret the mean of the random variable X.
(d) Compute the standard deviation of the random variable X.
(e) What is the probability that a randomly selected student has a parent involved in three activities?
(f) What is the probability that a randomly selected student has a parent involved in three or four activities?
ANSWER:
Step 1 of 7
In the following probability distribution, the random variable X represents the number of activities a parent of a 6th- to 8th-grade student is involved in.
x |
P(x) |
0 |
0.073 |
1 |
0.117 |
2 |
0.258 |
3 |
0.322 |
4 |
0.230 |