IEE 380 Final Exam Questions
with Correct AND DETAILED
ACCREDITED ANSWERS
ALREADY GRADED A+|| PASS!!!
S^2 is the ___________________ variance. - ANSWERS-sample
According to the text's notation, a residual is the difference between the
__________ response and the model-predicted response. - ANSWERS-actual
β0hat is the estimate of the ___________ in a simple linear regression model -
ANSWERS-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? - ANSWERS-not n-1
**************
How many values can a Poisson random variable have? - ANSWERS-not 2
*******A completely randomized experiment has n _______________ for each
treatment. - ANSWERS-not treatments
,The coefficient of determination is a measure of the __________ of variability
that can be accounted for by the model. - ANSWERS-fraction
Regarding hypothesis testing, alpha is the probability of Type I error. -
ANSWERS-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? - ANSWERS-not p0
Using the notation from the text, which of the following is analogous to "b" in
the linear model, y = mx + b? - ANSWERS-β0
Using the notation given in the text, which of the following estimates the
slope in a simple linear regression model? - ANSWERS-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 ? - ANSWERS-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 _______ - ANSWERS-columns
The number of items in a random sample is denoted as _______. -
ANSWERS-n
If X is the face value for the throw of a fair die, the name of the probability
distribution of X is the - ANSWERS-discrete random variable
, If random variable X has a/an _______________ number of values in a finite
interval of its range, X is continuous. - ANSWERS-infinite
An experiment that is repeated in the same manner every time but that can
result in different outcomes is called a _______________ experiment. -
ANSWERS-random
what are the random variables - ANSWERS-xbar, S, S^2
What letter is used to denote the number of observations in a sample? -
ANSWERS-n
The standard error of the sample mean is sigma/sqrt(n) - ANSWERS-true
********
The number of items in a population _______________. - ANSWERS-not is
always finite
An experiment that is repeated in the same manner every time but that can
result in different ____________ is called a random experiment. - ANSWERS-
outcomes
If you were asked to sketch the pdf of a normal random variable, X, you
would label the "y" axis as f(z) - ANSWERS-false
**********
A rivet is to be inserted into a hole. A random sample of 15 parts is selected
and the hole diameter is measured. The sample mean is 1.2 mm and the
sample standard deviation is .008 millimeters. Is there strong evidence to
with Correct AND DETAILED
ACCREDITED ANSWERS
ALREADY GRADED A+|| PASS!!!
S^2 is the ___________________ variance. - ANSWERS-sample
According to the text's notation, a residual is the difference between the
__________ response and the model-predicted response. - ANSWERS-actual
β0hat is the estimate of the ___________ in a simple linear regression model -
ANSWERS-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? - ANSWERS-not n-1
**************
How many values can a Poisson random variable have? - ANSWERS-not 2
*******A completely randomized experiment has n _______________ for each
treatment. - ANSWERS-not treatments
,The coefficient of determination is a measure of the __________ of variability
that can be accounted for by the model. - ANSWERS-fraction
Regarding hypothesis testing, alpha is the probability of Type I error. -
ANSWERS-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? - ANSWERS-not p0
Using the notation from the text, which of the following is analogous to "b" in
the linear model, y = mx + b? - ANSWERS-β0
Using the notation given in the text, which of the following estimates the
slope in a simple linear regression model? - ANSWERS-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 ? - ANSWERS-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 _______ - ANSWERS-columns
The number of items in a random sample is denoted as _______. -
ANSWERS-n
If X is the face value for the throw of a fair die, the name of the probability
distribution of X is the - ANSWERS-discrete random variable
, If random variable X has a/an _______________ number of values in a finite
interval of its range, X is continuous. - ANSWERS-infinite
An experiment that is repeated in the same manner every time but that can
result in different outcomes is called a _______________ experiment. -
ANSWERS-random
what are the random variables - ANSWERS-xbar, S, S^2
What letter is used to denote the number of observations in a sample? -
ANSWERS-n
The standard error of the sample mean is sigma/sqrt(n) - ANSWERS-true
********
The number of items in a population _______________. - ANSWERS-not is
always finite
An experiment that is repeated in the same manner every time but that can
result in different ____________ is called a random experiment. - ANSWERS-
outcomes
If you were asked to sketch the pdf of a normal random variable, X, you
would label the "y" axis as f(z) - ANSWERS-false
**********
A rivet is to be inserted into a hole. A random sample of 15 parts is selected
and the hole diameter is measured. The sample mean is 1.2 mm and the
sample standard deviation is .008 millimeters. Is there strong evidence to
