Course Home Homework morgan wells Microsoft Edge mathxl.com/Student/PlayerHomewo
ID: 3064913 • Letter: C
Question
Course Home Homework morgan wells Microsoft Edge mathxl.com/Student/PlayerHomework aspa/homeworkld 466161188iquestionld-68flushed-fasecid-4855081 8centerwin nayes Math 224-001 Introduction to Probability and Statistics morgan wells 1 3n omework: Math224 HW (5.3) core: 0 of 1 pt 6of8(6 complete) HW Score: 6 5.3.79 Chi he probability is 0.-4 that a traffic fatality involves an intoxicated or alcohol impaired driver or nonoccupant In eight trafic atalis, fnd the probabi which involve an intoxicated or alcohol-impaired driver or nonoccupant is exactly three; at least three; at most three between two and four, inclusive Find and interpret the mean of the random variable Y , Obtain the standard deviation of Y anan n rv pa.reu u.iver ur mu ..ai 4 reaai u "ee "a"n' iaiainrea "'vu're an "mJAn aigu u' puuvausmy Round to four decimal places as needed) ound to four decimal places as needed.) The probability that between two and four traffic fatalities, inclusive, involve an intoxicated or alcohol-impaired driver or nonoccupant is ound to four decimal places as needed)Explanation / Answer
We have been given params of normal distribution. Here' the answer:
p = .40
n = 8
a.P(X=3) = 8C3(.4^3)*(.6^5) = 0.2787
P(X>=3) = 0.6846
P(X<=3) = 0.5941
b.P(2<=X<=4) = 0.8263=0.31539 = 0.51091
c. Mean = np = .4*8 = 3.2
d. Stdev = sqrt(npq) = sqrt(.4*8*.6) = 1.3856