IEE 380 Final Exam Questions with Correct
Answers
Using the notation from the text, which of the following is analogous to "b" in the linear
model, y = mx + b?
β0
Using the notation given in the text, which of the following estimates the slope in a simple
linear regression model?
β1 hat
You have determined L and U such that P(L < sigma1^2/sigma2^2 < U) = .95. What
number will be in the this confidence interval if you fail to reject the null hypothesis H0:
sigma1^2 = sigma2^2 ?
1
When reading the Excel output for a randomized complete block design, you use the p-
values in the "Columns" row if your treatments are presented in the Excel sheet in _______
columns
The number of items in a random sample is denoted as _______.
n
If X is the face value for the throw of a fair die, the name of the probability distribution of
X is the
discrete random variable
,If random variable X has a/an _______________ number of values in a finite interval of its
range, X is continuous.
infinite
An experiment that is repeated in the same manner every time but that can result in
different outcomes is called a _______________ experiment.
random
what are the random variables
xbar, S, S^2
What letter is used to denote the number of observations in a sample?
n
S^2 is the ___________________ variance.
sample
According to the text's notation, a residual is the difference between the __________
response and the model-predicted response.
actual
β0hat is the estimate of the ___________ in a simple linear regression model
intercept
********
We want to do a hypothesis test on the difference between two population means and we do
, not know the population variances. We do a test of hypothesis on the equality of variances
and determine that we have evidence that the variances, though unknown, are equal. How
many degrees of freedom will our test statistic have?
not n-1
**************
How many values can a Poisson random variable have?
not 2
*******A completely randomized experiment has n _______________ for each treatment.
not treatments
The coefficient of determination is a measure of the __________ of variability that can be
accounted for by the model.
fraction
Regarding hypothesis testing, alpha is the probability of Type I error.
true
*******
We want to do a hypothesis test on the difference between two population means and we
are told the population standard deviation values for each population. Which test statistic
do we use?
not p0
The standard error of the sample mean is sigma/sqrt(n)
Answers
Using the notation from the text, which of the following is analogous to "b" in the linear
model, y = mx + b?
β0
Using the notation given in the text, which of the following estimates the slope in a simple
linear regression model?
β1 hat
You have determined L and U such that P(L < sigma1^2/sigma2^2 < U) = .95. What
number will be in the this confidence interval if you fail to reject the null hypothesis H0:
sigma1^2 = sigma2^2 ?
1
When reading the Excel output for a randomized complete block design, you use the p-
values in the "Columns" row if your treatments are presented in the Excel sheet in _______
columns
The number of items in a random sample is denoted as _______.
n
If X is the face value for the throw of a fair die, the name of the probability distribution of
X is the
discrete random variable
,If random variable X has a/an _______________ number of values in a finite interval of its
range, X is continuous.
infinite
An experiment that is repeated in the same manner every time but that can result in
different outcomes is called a _______________ experiment.
random
what are the random variables
xbar, S, S^2
What letter is used to denote the number of observations in a sample?
n
S^2 is the ___________________ variance.
sample
According to the text's notation, a residual is the difference between the __________
response and the model-predicted response.
actual
β0hat is the estimate of the ___________ in a simple linear regression model
intercept
********
We want to do a hypothesis test on the difference between two population means and we do
, not know the population variances. We do a test of hypothesis on the equality of variances
and determine that we have evidence that the variances, though unknown, are equal. How
many degrees of freedom will our test statistic have?
not n-1
**************
How many values can a Poisson random variable have?
not 2
*******A completely randomized experiment has n _______________ for each treatment.
not treatments
The coefficient of determination is a measure of the __________ of variability that can be
accounted for by the model.
fraction
Regarding hypothesis testing, alpha is the probability of Type I error.
true
*******
We want to do a hypothesis test on the difference between two population means and we
are told the population standard deviation values for each population. Which test statistic
do we use?
not p0
The standard error of the sample mean is sigma/sqrt(n)
