MyStatLab Final Exam
Do the Practice Final to help you prepare for the Final Exam. Do the Week 8 Final Exam.

Final Exam - Covers All Weeks
You must complete this Final Exam. It is designed to test your learning in the course. * Final Exam is worth a total of 250 points and contains 23 questions. * The exam covers all Weeks and all TCOs.

* The exam covers Chapters 1-7 and 9
* Remember to submit your exam when you are finished.
* You may take it once and have 3.5 hours to complete the exam. * If you have any problems, contact the Help Desk at 800-594-2402. Good Luck!
Question 1
Quantitative /Qualitative and Levels of Measurement
Question 2
Contingency Table
Question 3
Population/ sample
Question 4
Hypothesis Testing- either z or t-test
Question 5
Z or t- interval question
Question 6
Poisson or Binomial question
Question 7
Given a set of data points, you will have to calculate the descriptive stats- mean, median, mode, st. dev, variance, etc Question 8
Binomial question, if question 6 was a Poisson question and vice versa. Question 9
p-test or z-test , using the critical value method
Question 10
p-interval question
Question 11
Given set of data points, calculate correlation coefficient(r) and r2 Question 12
Binomial probability question
Question 13
Identifying null and alternate hypothesis
Question 14
Finding probability from z tables
Question 15
Z distribution question- Chapter 5
Question 16
Given a set of data points, you have to find the equation of the line- Chapter 9 Question 17
Identifying if the variable is quantitative or qualitative
Question 18
Minimum sample size calculation- Chapter 6
Question 19
Either z or t-test question with several parts; critical value as well a p-value method need to be known Question 20
Identify from the statement, the sampling technique- cluster, random , systematic, stratified, convenience etc Question 21
Z or t-test...

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QNT 561 FinalExam
1) Which of the following measures of central location is affected most by extreme values? A. MeanB. MedianC. Mode D. Geometric mean
2) A correlation matrix…A.Shows all simple coefficients of correlation between variablesB. shows only correlations that are zeroC. shoes the correlations that are positiveD. shows only the correlations that are statistically significant
3) In a set of observations, which measure of central tendency reports the value that occurs most often? A. Mean B. MedianC. ModeD. Geometric mean
4) Which level of measurement is required for the median? A. Nominal B. OrdinalC. IntervalD. Ratio
5) The mean and the variance are equal in…A. the normal distributionB. the binomial distributionC. the Poisson distributionD. the hypergeometric distribution
6) The difference between the sample mean and the population mean is called the…A. margin of errorB. population standard deviationC. standard error of the meanD. sampling error
7) A dummy variable or indicator variable… A. may assume only a value of 0 or 1B. is another term for the dependent variableC. is a quantitative variableD. is a variable at a ratio or interval level of measurement
8) A Type I error is…A. the correct decisionB. a value determined from the test statisticC. rejecting the null hypothesis when it is trueD. accepting the null hypothesis...

...How many standard deviations is my hypothesis (sample mean) is away from the actual (null hypothesis population mean)
T – statistic
Rejecting the null may be a mistake = p –value
ONE SAMPLE
3 formulas
T.Dist.rt (t, sample size - 1 “df”) -> alternative that mu is bigger than a
1 – T.Dist.rt (t, sample size – 1) -> mu is less than a
T.Dist.2t(t,samplesize - 1) -> not equal to
p < significant level reject the null
NEVER accept null
TWO SAMPLE
directly get the p-value
chance that under the null hypthoesis, you have a difference in the sample mean that is as extreme or more as what you have now. If that probability is small, it is something in the nature not due to chance.
* Paired: T.Test (sample 1, sample 2, # of tails , 1)
* not equal to: number of tails = 2
* greater than or less than: number of tails = 1
* Type 1 = paired data (ex: every UNC mba student’s salary before they entered the program and salaries after graduate )
* salaries have a significant increase after mba?
*
* Independent: T.Test (sample 1, sample 2, # tails, 2)
* Type 2 = independent (ex: UNC mbas vs. DUKE mbas)
*
*
*
* Regression Coefficient:
*
* Null hypothesis: THIS regression coefficient = 0
* alternative hypothesis: THIS particular regression coefficient of interest is not 0
*
* (driver’s p-value and coefficient in ANOVA)
*
* THIS driver’s p-value is less than significant...

...Research Methods FinalExamReview
1) What sets an experiment aside from the rest?
-random assignment
-manipulation
-controlling for confounds
-causal relationship
2) independent variable: variable that gets manipulated/controlled.
3) within subject: everybody gets exposed to all levels (treatment); experiment with a few individuals; Designed to study “laws” of behavior; Historically significant
4) between subjects: diff groups assigned to diff levels (control)
5) order effects: (testing effects): problem in within subject design; occur when participants are tested more than once in a study with early testing affecting later testing.
6) counterbalancing (combats testing effects): change the order; controlling for the effects of an extraneous variable by ensuring that its effects are equal in all treatment conditions. For example, order effects can be counterbalanced by administering the various procedures in different sequences.
7) systematic root differences (a problem in between subject designs)
8) match design (contains random assignment; combats systematic root differences): participants are grouped through the coupling of participants from similar attributes such as age, height, interests etc. used when there is an extraneous variable that the experimenter thinks might be related to the dependent variable … and the experimenter wants to be sure it does not become a confounding...

...1. There are four eras of Earth’s history they are Precambrian (87.6%), Paleozoic (7.1)%, Mesozoic (3.9 %), and Cenozoic (1.4 %)
2. There are four layers and two sub layers.
* Inner core is solid metal and made up of nickel and iron
* Outer core is made of a liquid molten core of nickel and iron
* Mantle is made up of dense and mostly solid silicate rock
* Lithosphere is the uppermost layer (100km thick)
* Asthenosphere is the layer below the lithosphere (100km -660km)
* Crust is thin silicate rock material on top
3. Pangaea is the proposed supercontinent that 200 million years ago supposedly began to shift apart and form our present continents. Alfred Wegener proposed this theory along with continental drift; Evidence he used includes matching fossils, rock types, and ancient climates.
4. The three types of plate boundaries are:
* Divergent boundaries are a region where the rigid plates are moving apart, typified by the oceanic ridges
* Convergent boundaries are a boundary in which two plates move together
* Transform boundaries are a boundary in which two plates slide past each other without creating or destroying lithosphere
5. Seismic waves are vibrations that travel through Earth carrying energy released during an Earthquake. Three types of seismic waves are:
* P-Waves: earthquake wave that pushes and pulls rock in the directions of the wave, also know as a compression wave...

...NT 1330 FinalExamReview
What is the difference between published and assigned software?
Typically, after you publish a software package to users in a site, domain, or OU, the users can use Add or Remove Programs to install the software. After you assign a software package to users in a site, domain, or OU, the software is advertised on the desktop. The application becomes available to the user the next time the user logs on (if application’s GPO applies to that user). The application is fully installed by the user from the Start menu, from Add or Remove Programs, from a desktop shortcut, or by opening a document (on demand) that has a file name extension that is associated with the application.
To backup active directory what feature do you install?
Install the backup features from the Server Manager.
What’s the name of the process to manually defrag active directory database?
SAM: Security Accounts Manager
What is a starter GPO?
A Starter GPO can be thought of as a Group Policy Object (GPO) template that may administrators use as a baseline while creating any new GPO.
Know the different tabs within the group policy management console: scope, details, settings and delegations and what they do.
What is the difference between MSI and MST?
When deploying software in a client server environment with either group policy or System Management Server, you are required to use an MSI file for the deployment. A MST file is a transform...

...PART I. HYPOTHESIS TESTING
PROBLEM 1 A certain brand of fluorescent light tube was advertised as having an effective
life span before burning out of 4000 hours. A random sample of 84 bulbs was burned out
with a mean illumination life span of 1870 hours and with a sample standard deviation of 90
hours. Construct a 95 confidence interval based on this sample and be sure to
interpret this interval.
Answer
Since population standard deviation is unknown, t distribution can be used construct the confidence
interval.
The 95% confidence interval is given by X t / 2,n 1
S
S
, X t /2,n 1
n
n
Details
Confidence Interval Estimate for the Mean
Data
Sample Standard Deviation
Sample Mean
Sample Size
Confidence Level
90
1870
84
95%
Intermediate Calculations
Standard Error of the Mean
9.819805061
Degrees of Freedom
83
t Value
1.988959743
Interval Half Width
19.53119695
Confidence Interval
Interval Lower Limit
1850.47
Interval Upper Limit
1889.53
2
PROBLEM 2 Given the following data from two independent data sets, conduct a one -tail
hypothesis test to determine if the means are statistically equal using alpha=0.05. Do NOT
do a confidence interval.
n1 = 35
n2 = 30
xbar1= 32
xbar2 = 25
s1=7
s2 = 6
Answer
H0:µ1=µ2
H1: µ1>µ2
Test statistics used is t
X1 X 2
S
2
(n1 1) S12 (n2 1) S2
n1n2
~ tn1 n1 2 where S
n1 n2 2
n1 n2
Decision rule : Reject the null hypothesis, if...

...1. (5 pts)What is the Hecksher-Ohlin Theory of Comparative Advantage?
This is a theory developed by two Swedish economists to explain how countries develop comparative advantage in certain areas rather than others.
The model works as follows:
1) Assume every country, for the most part, has access to the same technology.
2) Still, factors of production are difficult to move across national boundaries.
3) It follows from (2) that factors of production are relatively bound by geography and national borders, and that not every country can obtain the proportions need to maximize production.
4) Because the amount of productive resources differs between each country, it follows that countries will have comparative advantages in products that are intensive in factors that they have an abundance of.
(5 pts) Apply this model to explain trade between Great Britain and the United States in mid-nineteenth century.
Applying the model to U.S.-Great Britain trade:
1) Great Britain had a relative abundance of labor and scarcity of land.
2) The U.S. had an abundance of land and scarcity of labor.
3) Great Britain should develop a comparative advantage in sectors that were labor intensive and not very land-using such as factory production, cotton, and ironworking.
4) The U.S. should develop a comparative advantage in goods that require lots of land but little labor, such as wheat and corn.
5) Great Britain and the U.S. did develop comparative advantage in their expected areas,...

...Nt1310 FinalExamReview
NT1310 FinalExamReview
1. What unit of measurement is a tenfold logarithmic ratio of power output to power input?
Answer: Decibels is a unit of measurement that describes logarithmic ratio
2. What type of tool would be best for add connectors to twisted-pair cable
Answer: Crimpers
3. If the tip wire in your pair is white/blue, what color would you expect the ring to be
Answer: Blue
4. How many pairs of wires are in a binder group?
Answer: 25
5. What is added to fiber-optic cabling to provide additional support?
Answer: Nylon and Aluminum Coatings
6. What layer of the OSI reference model do routers work on?
Answer: Layer 3
7. What are examples of a makeshift tools?
Answer: Tennis Ball and Duct Tape
8. What should be included in cabling system documentation?
Answer: Network Diagrams
9. What is refraction?
Answer: Is the bending of light as it passes through a medium
10. What was the first full-scale commercial application of fiber-optic communication systems?
Answer: AT&T installed the first fiber optic cable system in 1977
11. How are optical fibers and copper different?
Answer: Digital transmission is superior to analog transmission by analog is affected by attenuation and nature
12. How is digital data transmission superior to analog data transmission?
Answer: It is not affected by attenuation or electrical impulses
13. How does...