Question
In: Statistics and Probability
4. A) The probability that a student from a certain university has a cell phone is...
4. A) The probability that a student from a certain university has a cell phone is 0.2. So, the probability that the tenth student randomly interviewed at this university is the fifth with Cell phones is:
B) On a certain day, the second stage of the environmental contingency plan was implemented in the Mexico City. If there are 50 companies in the area that corresponds to a supervisor, of which 15 did not follow contingency guidelines, then the probability that 3 companies out of the 10 that are verified will not follow the guidelines is:
C)If the planes arriving at an airport follow a Poisson process with an average rate of 8 planes per hour. The probability of exactly 10 aircraft arriving in the next 2 hours is as close to:
Solutions
orchestra answered 1 year agoRelated Solutions
The probability that a student graduating from West Texas A&M University has student loans to pay...
The probability that a student graduating from West Texas
A&M University has student loans to pay off after graduation is
0.60. If two students are randomly selected from this university,
what is the probability (rounded to the nearest two decimal places)
that neither of them has student loans to pay off after
graduation?
The following table gives the frequency distribution of the
number of telephones owned by a sample of 50 households selected
from a city.
Number of Telephones Owned ...
The amount of time that a certain cell phone will keep a charge is known to...
The amount of time that a certain cell phone will keep a charge
is known to be normally distributed with a standard deviation σ=15
hours. A sample of 45 cell phones has a mean time of 145 hours. Let
μ represent the population mean time that a cell phone
will keep a charge.
a. What is the point estimate of μ ?
b. What is the standard error of the point estimate? Round to
three decimal places.
c. Suppose that...
The amount of time that a certain cell phone will keep a charge is known to...
The amount of time that a certain cell phone will keep a charge
is known to be normally distributed with a standard deviation s =
15 hours. A sample of 45 cell phones has a mean time of 145 hours.
Let m represent the population mean time that
a cell phone will keep a charge.
a. What is the point estimate of m ?
b. What is the standard error of the point estimate? Round to
three decimal places.
c....
The amount of time that a certain cell phone will keep a charge is known to...
The amount of time that a certain cell phone will keep a charge
is known to be normally distributed with a population standard
deviation of 16 hours. A sample of 40 cell phones had a mean time
of 141 hours. Let u represent the population mean time that a cell
phone will keep a charge. a. What is the critical value given a 95%
confidence interval is to be constructed for the mean time? b. What
is the margin of...
The lifetime of batteries in a certain cell phone brand is normally distributed with a mean...
The lifetime of batteries in a certain cell phone brand is
normally distributed with a mean of 3.25 years and a standard
deviation of 0.8 years.
(a) What is the probability that a battery has a lifetime of more
than 4 years?
(b) What percentage of batteries have a lifetime between 2.8 years
and 3.5 years?
(c) A random sample of 50 batteries is taken. The mean lifetime L
of these 50 batteries is recorded. What is the probability that...
Consider the probability that at least 36 out of 298 cell phone calls will be disconnected....
Consider the probability that at least 36 out of 298 cell phone
calls will be disconnected. Choose the best description of the area
under the normal curve that would be used to approximate binomial
probability.
The option are
Area to the right of 35.5
Area to the right of 36.5
Area to the left of 35.5
Area to the left of 36.5
Area between 35.5 and 36.5
The Phone Company has the following costs of producing and selling a cell phone when it...
The Phone Company has the following costs of producing and
selling a cell phone when it produces and sells 100,000 cell phones
per month:
Per unit manufacturing cost
Direct
materials
$60.00
Direct
labor
10.00
Variable manufacturing overhead cost
35.00
Fixed manufacturing overhead cost
20.00
Per unit selling cost
Variable
20.00
Fixed
10.00
Note that ‘100,000’ is the denominator used to calculate
fixed costs per unit. Total fixed costs...
According to a study done by a university student, the probability a randomly selected individual will...
According to a study done by a university student, the
probability a randomly selected individual will not cover his or
her mouth when sneezing is 0.267. Suppose you sit on a bench in a
mall and observe people's habits as they sneeze.
(a) What is the probability that among 8 randomly observed
individuals exactly 4 do not cover their mouth when sneezing?
(b) What is the probability that among 18 randomly observed
individuals fewer than 6 do not...
According to a study done by a university student, the probability a randomly selected individual will...
According to a study done by a university student, the
probability a randomly selected individual will not cover his or
her mouth when sneezing is
0.267. Suppose you sit on a bench in a mall and observe
people's habits as they sneeze.
(a) What is the probability that among 18
randomly observed individuals exactly 8 do not cover their mouth
when sneezing?
(b) What is the probability that among 18
randomly observed individuals fewer than 3 do not cover their...
According to a study done by a university student, the probability a randomly selected individual will...
According to a study done by a university student, the
probability a randomly selected individual will not cover his or
her mouth when sneezing is 0.2670.
Suppose you sit on a bench in a mall and observe people's
habits as they sneeze.
(a) What is the probability that among 18 randomly observed
individuals exactly 5 do not cover their mouth when sneezing?
(b) What is the probability that among 18 randomly observed
individuals fewer than 3 do not cover their...
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