ECN 221 Questions and Answers with Verified Solutions | Latest 2026
Update
Q: 17 times?
Answer:
13.2061
Q: standard deviation of the number
Answer:
square root of n*p*(1-p)
Q: expected number
Answer:
n*p
,ECN 221 Questions and Answers with Verified Solutions | Latest 2026
Update
Q: A call center receives an average of 12 calls per hour. Assuming the number of
calls received
Answer:
follows the Poisson distribution, determine the probability would receive exactly 18
calls in a
given hour. 2.555
Q: what is the variance
Answer:
The variance of the Poisson distribution is equal to the expect value
Q: continuous random variable
Answer:
a random variable that may assume any numerical value in an
interval or collection of intervals
, ECN 221 Questions and Answers with Verified Solutions | Latest 2026
Update
Q: probability density function
Answer:
The mathematical function that describes a continuous
probability distribution. It is represented by f(X).
Q: uniform probability distribution
Answer:
All outcomes of a data set having equal probability(e.g. roll
of a die). 1/(b-a)
Q: normal probability distribution
Answer:
A continuous probability distribution. Its probability density
function is bell-shaped and determined by its mean and standard deviation . 1/sd
sqaureroot
2pie
Update
Q: 17 times?
Answer:
13.2061
Q: standard deviation of the number
Answer:
square root of n*p*(1-p)
Q: expected number
Answer:
n*p
,ECN 221 Questions and Answers with Verified Solutions | Latest 2026
Update
Q: A call center receives an average of 12 calls per hour. Assuming the number of
calls received
Answer:
follows the Poisson distribution, determine the probability would receive exactly 18
calls in a
given hour. 2.555
Q: what is the variance
Answer:
The variance of the Poisson distribution is equal to the expect value
Q: continuous random variable
Answer:
a random variable that may assume any numerical value in an
interval or collection of intervals
, ECN 221 Questions and Answers with Verified Solutions | Latest 2026
Update
Q: probability density function
Answer:
The mathematical function that describes a continuous
probability distribution. It is represented by f(X).
Q: uniform probability distribution
Answer:
All outcomes of a data set having equal probability(e.g. roll
of a die). 1/(b-a)
Q: normal probability distribution
Answer:
A continuous probability distribution. Its probability density
function is bell-shaped and determined by its mean and standard deviation . 1/sd
sqaureroot
2pie
