Question
A commuter must pass through five traffic lights on her way to work and will have...
A commuter must pass through five traffic lights on her way to work and will have to stop at each one that is red. She estimates the probability model for the number of red lights she hits (xx), as shown below:
| xx | 0 | 1 | 2 | 3 | 4 | 5 |
| p(x)p(x) | 0.03 | 0.15 | pp | 0.11 | 0.1 | 0.07 |
Find the probability that she hits at most 3 red lights. Answer to 2 decimal places.
| Incorrect. | Tries 1/5 | Previous Tries |
Find the probability that she hits at least 3 red lights. Answer to 2 decimal places.
| Incorrect. | Tries 1/5 | Previous Tries |
How many red lights she expect to hit? Answer to 2 decimal places.
| Incorrect. | Tries 1/5 | Previous Tries |
What is the standard deviation of number of red lights she hits? Answer to 3 decimal places.
| Incorrect. | Tries 1/5 | Previous Tries |
Let us consider any two consecutive days. What is the chance that she hits exactly two red lights on both days? Answer to 4 decimal places.
| Incorrect. | Tries 1/5 | Previous Tries |
Homework Answers
Answer #1
Not the answer you're looking for?
Similar Questions
Question 1: Jane must pass through five traffic lights on her way to work and will...
Question 1: Jane must pass through five traffic lights on her
way to work and will have to stop at each one that is red. The
probability that the number of red lights she hits when she goes to
work is: Number of red lights 0 1 2 3 4 5 Probability 0.05 0.15 ???
0.10 0.15 0.05 a. Find “???”. b. How many red lights should she
expect to hit each day? c. What is the standard deviation?
The histogram shows the distribution of stops for red traffic lights a commuter must pass through...
The histogram shows the distribution of stops for red traffic
lights a commuter must pass through on her way to work. Use the
histogram to find the mean, variance, standard deviation, and
expected value of the probability distribution. 0 1 2 3 4 5 0.00
0.10 0.20 0.30 0.40 x P(x) 0.03 0.25 0.35 0.14 0.14 0.09 x y graph
The mean is nothing. (Round to two decimal places as needed.)
A student must pass through two sets of traffic lights on his way to work. The...
A student must pass through two sets of traffic lights on his
way to work. The first light is red 50% of the time, yellow 5% of
the time and green 45% of the time. The second light is red 20% of
the time, yellow 10% of the time and green 70% of the time.
Assuming that the lights operate independently, what is the
probability that the student has to stop at least one time on his
way to work?...
There are two traffic lights on a commuter's route to and from work. Let X1 be...
There are two traffic lights on a commuter's route to and from
work. Let X1 be the number of lights at which
the commuter must stop on his way to work, and
X2 be the number of lights at which he must
stop when returning from work. Suppose that these two variables are
independent, each with the pmf given in the accompanying table (so
X1, X2 is a random sample
of size n = 2).
x1
0
1
2
μ...
A number of minor automobile accidents occur at various high-risk intersections despite traffic lights. The traffic...
A number of minor automobile accidents occur at various
high-risk intersections despite traffic lights. The traffic
department claims that a modification in the type of light will
reduce these accidents. The traffic commissioners have agreed to a
proposed experiment. Eight intersections were chosen at random, and
the lights at those intersections were modified. The numbers of
minor accidents during a six-month period before and after the
modifications were as follows:
Number of Accidents
A
B
C
D
E
F
G...
A number of minor automobile accidents occur at various high-risk intersections despite traffic lights. The traffic...
A number of minor automobile accidents occur at various
high-risk intersections despite traffic lights. The traffic
department claims that a modification in the type of light will
reduce these accidents. The traffic commissioners have agreed to a
proposed experiment. Eight intersections were chosen at random, and
the lights at those intersections were modified. The numbers of
minor accidents during a six-month period before and after the
modifications were as follows:
Number of Accidents
A
B
C
D
E
F
G...
On 100 different days, a traffic engineer counts the number of cars that pass through a...
On 100 different days, a traffic engineer counts the number of
cars that pass through a certain intersection between 5 P.M. and
5:05 P.M. The results are presented in the following table.
Number of Cars
Number of Days
Proportion of Days
0
36
0.36
1
28
0.28
2
15
0.15
3
10
0.1
4
7
0.07
5
4
0.04
Someone says that neither of the functions is a good model since
neither one agrees with the data exactly. Is this...
The following two-way table of counts summarizes whether respondents smoked or not and whether they have...
The following two-way table of counts summarizes whether
respondents smoked or not and whether they have had ever divorced
or not for persons who had ever been married.
Ever Divorced?
Smoke?
Yes
No
Yes
290
204
No
436
455
Among those who smoked, what percentage has ever been divorced?
[Answer to 2 decimal places. Do not type % symbol in the
box.] %
Tries 0/5
Among those who has ever been divorced, what percentage smoked?
[Answer to 2 decimal places. Do...
A random sample of 5 college women was asked for their own heights and their mothers'...
A random sample of 5 college women was asked for their own
heights and their mothers' heights. The researchers wanted to know
whether the college women are taller on average than their mothers.
The results (in inches) follow:
Pair
1
2
3
4
5
Daughter
65
68
67
66
63
Mother
65
65
67
66
66
Let d=d= daughter's height - mother's height, and let μdμd
represent the average height difference of daughter-mother
pairs.
What is the sample mean of...
a. There are 8 possible combinations of birth order for families with 3 children (b =...
a. There are 8 possible combinations of birth order for families
with 3 children (b = boy and g = girl): bbb, bbg, bgb, bgg, gbb,
gbg, ggb, ggg. Assume all outcomes are equally likely. You select a
three-child family at random. What is the probability that at least
one child is a boy, given that the first-born was a girl? Round
your answer to three decimal
b. A special deck of 20 cards has 5 that are red, 5...
ADVERTISEMENT
Need Online Homework Help?
Get Answers For Free
Most questions answered within 1 hours.
ADVERTISEMENT
Active Questions
asked 1 minute ago
asked 1 minute ago
asked 25 minutes ago
asked 25 minutes ago
asked 46 minutes ago
asked 46 minutes ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago