IEE 380 Exam 1 QUESTIONS
AND VERIFIED CORRECT
ANSWERS GRADED A+
LATEST 100% GUARANTEED
PASS
Let the random variable X denote the number of the 48 voice lines that are in use at a particular
time. Assume that X is a discrete uniform random variable with a range of 0 to 48. What is the
probability that the number of voice lines in use at a particular time is more than 46? Use
conventional Rounding methods. - CORRECT ANSWER-0.0408
When we plot _____________, we see "blades of grass." - CORRECT ANSWER-the pmf of a
discrete random variable
The time to recharge the flash is tested in three cell-phone cameras. The probability that a
camera passes the test is 0.8, and the cameras perform independently. What is the probability
that the number of cameras that pass the test is more than 1? Round to 3 decimal places. -
CORRECT ANSWER-0.896
P(A∪B) + P(A∩B) = P(A) + ____ - CORRECT ANSWER-P(B)
In the Binomial pmf, the letter p (the one appearing on the right side of the equals sign) is -
CORRECT ANSWER-the probability of "success" of each Bernoulli trial
, Samples of water are taken from 18 different locations. Each sample of water has a 10% chance
of containing a particular organic pollutant. Assume that the samples are independent with
regard to the presence of the pollutant. If we want to determine the probability that more than
6 samples contain the pollutant, the definition of our random variable will be:
X is the probability that more than 6 samples contain the pollutant
True/False - CORRECT ANSWER-False
If X is a discrete random variable, P(3 < X < 7) may be expressed as: 1. F(6) - F(3) 2. p(3) + p(5) +
p(6)
True/False - CORRECT ANSWER-True
If we want to determine the pdf from a CDF for a continuous random variable, we _________
the CDF. - CORRECT ANSWER-differentiate
What is the text notation for the probability density function of a continuous random variable,
X? - CORRECT ANSWER-f(x)
X is the number of earthquakes in a year. X is known to be Poisson with a mean equal to 3.6
earthquakes per year. What is the probability that the number of earthquakes in 2 years is equal
to 5? Enter your answer to four decimal places using conventional rounding methods. -
CORRECT ANSWER-0.1204
Suppose that X is a continuous random variable between a = 4.9 mA and b = 5.1 mA. What is
the probability that X is equal to 5.0? If your answer is non-integer, express it to two decimal
places. - CORRECT ANSWER-0
AND VERIFIED CORRECT
ANSWERS GRADED A+
LATEST 100% GUARANTEED
PASS
Let the random variable X denote the number of the 48 voice lines that are in use at a particular
time. Assume that X is a discrete uniform random variable with a range of 0 to 48. What is the
probability that the number of voice lines in use at a particular time is more than 46? Use
conventional Rounding methods. - CORRECT ANSWER-0.0408
When we plot _____________, we see "blades of grass." - CORRECT ANSWER-the pmf of a
discrete random variable
The time to recharge the flash is tested in three cell-phone cameras. The probability that a
camera passes the test is 0.8, and the cameras perform independently. What is the probability
that the number of cameras that pass the test is more than 1? Round to 3 decimal places. -
CORRECT ANSWER-0.896
P(A∪B) + P(A∩B) = P(A) + ____ - CORRECT ANSWER-P(B)
In the Binomial pmf, the letter p (the one appearing on the right side of the equals sign) is -
CORRECT ANSWER-the probability of "success" of each Bernoulli trial
, Samples of water are taken from 18 different locations. Each sample of water has a 10% chance
of containing a particular organic pollutant. Assume that the samples are independent with
regard to the presence of the pollutant. If we want to determine the probability that more than
6 samples contain the pollutant, the definition of our random variable will be:
X is the probability that more than 6 samples contain the pollutant
True/False - CORRECT ANSWER-False
If X is a discrete random variable, P(3 < X < 7) may be expressed as: 1. F(6) - F(3) 2. p(3) + p(5) +
p(6)
True/False - CORRECT ANSWER-True
If we want to determine the pdf from a CDF for a continuous random variable, we _________
the CDF. - CORRECT ANSWER-differentiate
What is the text notation for the probability density function of a continuous random variable,
X? - CORRECT ANSWER-f(x)
X is the number of earthquakes in a year. X is known to be Poisson with a mean equal to 3.6
earthquakes per year. What is the probability that the number of earthquakes in 2 years is equal
to 5? Enter your answer to four decimal places using conventional rounding methods. -
CORRECT ANSWER-0.1204
Suppose that X is a continuous random variable between a = 4.9 mA and b = 5.1 mA. What is
the probability that X is equal to 5.0? If your answer is non-integer, express it to two decimal
places. - CORRECT ANSWER-0
