### How JustAnswer Works:

• Ask an Expert
• Get a Professional Answer
• 100% Satisfaction Guarantee

## Ask Scott Your Own Question

Scott, MIT Graduate
Category: Homework
Satisfied Customers: 3040
Experience:  MIT Graduate (Math, Programming, Science, and Music)
3546829
Type Your Homework Question Here...
Scott is online now

# QNT 561 Final Exam

### Customer Question

QNT 561 Final Exam
Submitted: 4 years ago.
Category: Homework
Expert:  Dr. Amit replied 4 years ago.
HelloCustomerbr />Kindly post the questions (complete with choices) so that i can see the questions and try to help you out.
Regards
Customer: replied 4 years ago.

TRUE/FALSE: Mark the answers by highlighting T if the statement is true or F if the statement is false.

T F Q1:The number of individuals in a family is a continuous variable.

T F Q2:John Cortiz is examining the results of a study that covered the entire population. John is examining a census.

T F Q3:If the population distribution is skewed left, the mean will be less than the median, and if the population distribution is skewed right, the mean will exceed the median.

T F Q4:When two events are mutually exclusive, the probability that either event will occur can be found by simply multiplying together their individual probabilities of occurrence.

T F Q5: A random sample of 64 cars passing a check point on a certain highway showed a mean speed of 60 mph. The standard deviation of speeds is known to be 15 mph. In this case 60 mph is a point estimate of the population mean speed on this highway. T F Q6: According to the Central Limit Theorem, the shape of the sampling distribution of sample mean (given that n ³ 30) will be normal, whether or not the shape of the population is normal. T F Q7: If the sample size is large (n ³ 30), the standard deviation of the sample mean will equal the population standard deviation for that random variable. T F Q8: Level of confidence is another name for level of significance. T F Q9: If we would reject a null hypothesis at the 5% level, we would also reject it at the 1% level.T F Q10: In a one-way ANOVA, when the null hypothesis is false, the calculated F-ratio would exceed the critical value of F for the chosen significance level.

(Questions 11 to 25 are 1/2 point each)

MULTIPLE CHOICE: Select the correct answer in each of Questions 11 to 25 by highlighting your choice. There is only one correct answer to each question. Multiple selection will be taken as an incorrect answer.

Q11: Populations are studied using samples because of all of the following reasons except

a. it usually takes too much time to study the entire population.

b. management need not be concerned about sampling error.

c. studying the entire population is not cost effective.

d. it may not be possible to identify all the members of the population.

Q12: Which of the following are factors that are important in determining the size of the sample needed in a study?

1. The amount of variation in the population

2. The size of the population

3. The amount of error that can be tolerated

a. 1

b. 2

c. 3

d. 1, 2, and 3

Q13: Arrange the following steps in correct sequence:

1. Begin sampling.

2. Determine the sample size.

3. Establish the sampling frame.

a. 1, 2, 3

b. 2, 1, 3

c. 3, 1, 2

d. 3, 2, 1

Q14: Consider the following two columns that describe different types of data:

A. Nominal

1. Qualitative B. Discrete

2. Quantitative C. Ordinal

D. Continuous

The correctly paired groupings of the two columns is

a. 1-AB 2-CD

b. 1-AD 2-BC

c. 1-AC 2-BD

d. 1-BC 2-AD

Q15: What area under the standard normal curve falls outside the Z values -1.96 and 1.96?a. 0.05 b. 0.01 c. 0.90
`d.  0.10      `
Q16: If each of a set of raw scores is transformed into a Z-score, the new distribution will have a standard deviation equal toa. zero.b. one.c. the mean of the original distribution.
`d.  the standard deviation of the original distribution.`
Q17: Which of the following random variables are continuous and which are discrete? 1. Score in a IQ Test 2. number of kittens in a litter 3. number of cars crossing a Traffic Light in one hour
`    4.  the number of rainy days in a month`
a. 1, 2 continuous; 3, 4 discreteb. 1, 3, 4 continuous; 2 discrete
`c.  4  continuous;  1, 2, 3  discrete`
d. 1 continuous; 2, 3, 4 discrete Q18: A factor that is varied by an experimenter in order to assess its effect is known as a(n):a. dependent variableb. independent variablec. control variable
`d.  none of the above`
Q19: When (for what level of confidence) do we use Z = 1.645, for a two-sided test or confidence interval?a. 90%b. 95%c. 80%
`d.  100%     `

Q20:Given a two-tail test for the population mean, the null hypothesis contains a(n) __________ sign, and the alternative hypothesis contains a(n) ___________ sign.

a. ¹, =

b. =, ³

c. £, =

d. =, ¹

Q21: The appropriate alternative hypothesis for a lower tail test to determine if mean body weight of all the men who have joined a health club is less than 185 pounds would be

a. HA: m ³ 185 lb.

b. HA: m < 185 lb.

c. HA: m = 185 lb.

d. HA: m ¹ 185 lb.

Q22: Which of the following is/are an appropriate null hypothesis for a two-sided test of the difference between two population means?

1. H0: m1 = m2

2. H0: m1 ¹ m2

3. H0: m1 - m2 = 0

a. 1

b. 2

c. 3

d. both 1 and 3

Q23: If the two samples are not independent, their population means can still be compared using the ____________ statistic.

a. paired t

b. Z

c. F

d. chi-square

Q24: A linear regression between Y and X produced the following equation for the least squares line:

= -4.3 + 2.1x

Which of the following statements concerning this relationship is true?

a. For every one-unit increase in X, Y increases 4.3 units.

b. For every one-unit increase in X, Y decreases 2.1 units.

c. For every one-unit increase in X, Y decreases 4.3 units.

d. For every one-unit increase in X, Y increases 2.1 units.

Q25: A regression line has been found and the statistician wants to know if the line has a slope. What is the appropriate null hypothesis to test?

a. H0: b1 = 0.

b. H0: b1 > 0.

c. H0: b1 < 0.

d. H0: b1 ¹ 0.

Expert:  Dr. Amit replied 4 years ago.
Thanks for the reply
But i am sorry, i can't help you on this. So i am opting out so that other experts can help you.
Regards

### JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

### What Customers are Saying:

• Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
< Last | Next >
• Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
• This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
• Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
• I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
• Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
• Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland
• He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here. Diane Dallas, TX

• ### Manal Elkhoshkhany

#### Satisfied Customers:

4522
More than 5000 online tutoring sessions.
< Last | Next >
• http://ww2.justanswer.com/uploads/BU/BusinessTutor/2012-2-2_115741_Kouki2.64x64.jpg Manal Elkhoshkhany's Avatar

### Manal Elkhoshkhany

#### Satisfied Customers:

4522
More than 5000 online tutoring sessions.
• http://ww2.justanswer.com/uploads/ComputersGuru/2010-02-13_051118_Photo41.JPG LogicPro's Avatar

### LogicPro

#### Satisfied Customers:

3458
Expert in Java C++ C C# VB Javascript Design SQL HTML
• http://ww2.justanswer.com/uploads/LI/lindaus/2012-6-10_04811_IMG20120609164157.64x64.jpg Linda_us's Avatar

### Linda_us

#### Satisfied Customers:

3124
Post Graduate Diploma in Management (MBA)
• http://ww2.justanswer.com/uploads/chooser77/2009-08-18_162025_Chris.jpg Chris M.'s Avatar

### Chris M.

#### Satisfied Customers:

2385
Master's Degree, strong math and writing skills, experience in one-on-one tutoring (college English)
• http://ww2.justanswer.com/uploads/JawaadAhmed/2009-6-27_12137_SIs_SHadi.jpg F. Naz's Avatar

### F. Naz

#### Satisfied Customers:

1988
Experience with chartered accountancy
• http://ww2.justanswer.com/uploads/JK/jkcpa/2011-1-16_182614_jkcpa.64x64.jpg Bizhelp's Avatar

### Bizhelp

#### Satisfied Customers:

1876
Bachelors Degree and CPA with Accounting work experience
• http://ww2.justanswer.com/uploads/avremote/photoa.jpg Seanna's Avatar

### Seanna

#### Satisfied Customers:

1781
3,000+ satisfied customers, all topics, A+ work

Chat Now With A Tutor
Scott
MIT Graduate
3040 Satisfied Customers
MIT Graduate (Math, Programming, Science, and Music)