IEE 380 UPDATED FINALS EXAM QUESTIONS AND
SOLUTIONS GUARANTEE A+
✔✔In Chapter 3, the authors use f(x) to denote the probability that a discrete random
variable X (upper case) equals a specific measured numerical value, x, lowercase. In
other words, the text shows f(x) = P(X = x) for X discrete.
What does Dr. Chattin use to denote P(X = x)? - ✔✔p(x)
✔✔H0: β1 = β2 = ... = βι = 0
H1: At least one βi not equal to 0
Fill in the three blanks with three words: We call this hypothesis test the
____________________ ________________ ___________________ test. -
✔✔significance of regression
✔✔Suppose the pdf of X is given as f(x) = .25 for 3 < x < 8
How many numerical values can X be? - ✔✔infinite
✔✔*********
The number of items in a finite population is denoted as _______. - ✔✔not n
✔✔The pdf of a continuous random variable, X, is the first ________________ of the
CDF of X. Enter one word as your answer. - ✔✔derivative
✔✔(Xbar-mu)/(sigma/sqrt(n)) has what probability distribution? - ✔✔Standard Normal
✔✔Figure 1-2 shown in the text and in the notes is a ________ diagram showing data
location and variability. - ✔✔dot
✔✔Suppose we have a T random variable with 24 degrees of freedom. What is E(T)? -
✔✔0
✔✔********
Suppose the number of people who cross on a green light at Rural and University
(going south) is a Poisson random variable, X, with a mean equal to 12 people. What is
the variance of X? - ✔✔not 1/12 people^2
✔✔The test statistic we use on a hypothesis test on the mean, variance known, is z0 =
(Xbar-mu)/(sigma/sqrt(n)) - ✔✔true
, ✔✔*********
In a/an ___________________, the engineer makes deliberate or purposeful changes
in the controllable variables of the system or process to determine which variables are
responsible for any changes. - ✔✔not retrospective study
✔✔*********
Consider H0: mu = 4 and H1: mu ≠ 4. The test statistic is computed to be z0 = 2.11.
Which statement is true about the p-value? - ✔✔not The p-value is the area above 2.11
✔✔Suppose X is the number of cars per minute that go north through the intersection of
College and University has the Poisson pmf with a mean of 18 cars/minute. If we define
Y to be the number of cars that go north through that same intersection in 30 seconds,
what is the mean of Y? - ✔✔9 cars per 30 seconds
✔✔p0 and phat are equivalent - ✔✔false
✔✔If you want to determine the 99% 2-sided confidence bound on the population
standard deviation, you need _____ - ✔✔X^2_.005,n-1
✔✔Suppose random variable X has a pdf: f(x) = 2 for 1 < x < 1.5 (This is called the
Continuous Uniform pdf.)
What is the probability that X is equal to 1.25? - ✔✔0
✔✔X is a continuous random variable. Therefore, for two numerical values in the range
of X, x1 and x2,
P(x1 < X < x2) = P(x1 < X < x2) - ✔✔true
✔✔Find Example 3-11 in the text. In the equation shown for the computation of the
variance of X, V(X), what is another representation of this portion of the right side of that
equation: - ✔✔E(X^2)
✔✔Type II error is like letting a [x] man go [y]. - ✔✔Specified Answer for: x
guilty
Specified Answer for: y
free
✔✔********
The entry in the Z table (CDF of a standard normal random variable) corresponding to a
row label of 1.2 and a column label of .03 is - ✔✔not p(1.23)
SOLUTIONS GUARANTEE A+
✔✔In Chapter 3, the authors use f(x) to denote the probability that a discrete random
variable X (upper case) equals a specific measured numerical value, x, lowercase. In
other words, the text shows f(x) = P(X = x) for X discrete.
What does Dr. Chattin use to denote P(X = x)? - ✔✔p(x)
✔✔H0: β1 = β2 = ... = βι = 0
H1: At least one βi not equal to 0
Fill in the three blanks with three words: We call this hypothesis test the
____________________ ________________ ___________________ test. -
✔✔significance of regression
✔✔Suppose the pdf of X is given as f(x) = .25 for 3 < x < 8
How many numerical values can X be? - ✔✔infinite
✔✔*********
The number of items in a finite population is denoted as _______. - ✔✔not n
✔✔The pdf of a continuous random variable, X, is the first ________________ of the
CDF of X. Enter one word as your answer. - ✔✔derivative
✔✔(Xbar-mu)/(sigma/sqrt(n)) has what probability distribution? - ✔✔Standard Normal
✔✔Figure 1-2 shown in the text and in the notes is a ________ diagram showing data
location and variability. - ✔✔dot
✔✔Suppose we have a T random variable with 24 degrees of freedom. What is E(T)? -
✔✔0
✔✔********
Suppose the number of people who cross on a green light at Rural and University
(going south) is a Poisson random variable, X, with a mean equal to 12 people. What is
the variance of X? - ✔✔not 1/12 people^2
✔✔The test statistic we use on a hypothesis test on the mean, variance known, is z0 =
(Xbar-mu)/(sigma/sqrt(n)) - ✔✔true
, ✔✔*********
In a/an ___________________, the engineer makes deliberate or purposeful changes
in the controllable variables of the system or process to determine which variables are
responsible for any changes. - ✔✔not retrospective study
✔✔*********
Consider H0: mu = 4 and H1: mu ≠ 4. The test statistic is computed to be z0 = 2.11.
Which statement is true about the p-value? - ✔✔not The p-value is the area above 2.11
✔✔Suppose X is the number of cars per minute that go north through the intersection of
College and University has the Poisson pmf with a mean of 18 cars/minute. If we define
Y to be the number of cars that go north through that same intersection in 30 seconds,
what is the mean of Y? - ✔✔9 cars per 30 seconds
✔✔p0 and phat are equivalent - ✔✔false
✔✔If you want to determine the 99% 2-sided confidence bound on the population
standard deviation, you need _____ - ✔✔X^2_.005,n-1
✔✔Suppose random variable X has a pdf: f(x) = 2 for 1 < x < 1.5 (This is called the
Continuous Uniform pdf.)
What is the probability that X is equal to 1.25? - ✔✔0
✔✔X is a continuous random variable. Therefore, for two numerical values in the range
of X, x1 and x2,
P(x1 < X < x2) = P(x1 < X < x2) - ✔✔true
✔✔Find Example 3-11 in the text. In the equation shown for the computation of the
variance of X, V(X), what is another representation of this portion of the right side of that
equation: - ✔✔E(X^2)
✔✔Type II error is like letting a [x] man go [y]. - ✔✔Specified Answer for: x
guilty
Specified Answer for: y
free
✔✔********
The entry in the Z table (CDF of a standard normal random variable) corresponding to a
row label of 1.2 and a column label of .03 is - ✔✔not p(1.23)
