Login

Contact Us
Calculus and Above
Calculus Questions? Ask a Mathematician for Answers ASAP
Not a Calculus and Above Question?
How JustAnswer Works:
Ask an Expert
Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
Get a Professional Answer
Via email, text message, or notification as you wait on our site.
Ask follow up questions if you need to.
100% Satisfaction Guarantee
Rate the answer you receive.
Ask Ryan Your Own Question
Ryan
,
Engineer
Category:
Calculus and Above
Satisfied Customers:
8742
Experience:
B.S. in Civil Engineering
40260889
Type Your Calculus and Above Question Here...
Ryan is online now
A public opinion poll surveyed a simple random sample of voters.
Customer Question
A public opinion poll surveyed a simple random sample of voters. Respondents were classified by gender and by voting preference—Republican, Democrat, or Independent. The results follow.
Voting Preferences Republican Democrat Independent Row total
Male 200 150 50 400
Female 250 300 50 600
Column total 450 450 100 1000
If you conduct a chisquare test of independence, what is the expected frequency count of male Independents?
A. 50
B. 60
C. 40
D. 30
22) What parametric test is equivalent to the nonparametric Spearman's rank test?
A. Ttest of correlation coefficient
B. Ttest of two sample means
C. Ttest of one sample mean.
D. Ttest of two sample proportions
23) What is the variable used to predict another variable called?
A. Independent variable
B. Dependent variable
C. Moderating variable
D. Intervening variable
24) Michelle used a sample of 50 U.S. cities to estimate the relationship between crime, or annual property crimes per 100,000 persons, and income, or median income per capita. Her estimated regression equation was crime = 428  .01 income. Assuming her model is statistically significant, if income decreases by $1,000, we would predict that crime will
A. decrease by 1
B. increase by 10
C. decrease by 10
D. increase by 100
25) In the least squares equation, Y' = 12 + 25X the value of 25 indicates
A. the y intercept
B. for each unit increase in 'x', y' increases by 25
C. for each unit increase in 'y', 'x' increases by 25
D. the residual of 'x' factor
26) A test is conducted in eight cities to see if giving away free transit system maps will increase bus ridership. In a regression analysis, the dependent variable is the increase in bus ridership in thousands of persons from the start of the test until its conclusion. The independent variables are X1 = the number in thousands of free maps distributed and X2 = a binary equal to 1, if the city has free downtown parking and 0 otherwise. The estimated regression equation is Y = 1.32+.0345X11.45X2. If the Y value for city 3 is 7.3, X1 = 140, and X2 = 0 the residual for city 3 in thousands is:
A. 6.34
B. 1.15
C. .57
D. 2.01
27) The following linear trend equation was developed for the annual sales of the Tractor Manufacturing Company. Y' = 355 + 50t in thousands of dollars. How much are sales increasing by?
A. $50,000 per year
B. $5,00 per month
C. $500,000 per year
D. $6,000 per year
28) The time series component that reflects variability over short, repetitive time periods that last less than one year is called
A. longterm trend
B. cyclical variation
C. seasonal variation
D. irregular variation
29) A research company has been hired by a realty company to do an analysis of heating cost of homes in the region. The realty company wanted to be able to predict the heating cost of a typical singlefamily home. The realty company was constantly being asked questions regarding heating costs by potential home buyers. It was believed that these variables would impact heating costs (Y'): mean daily outdoor temperature (X1), the number of inches of insulation (X2), and the age in years of the furnace (X3). The multiple regression analysis produced the following regression equation: Y' = 427.2 – 4.58X1 – 14.83X2 + 6.10X3. Which statement is correct based on this analysis?
A. The age of the furnace has an indirect relationship with heating costs.
B. There is an inverse relationship between outdoor temperature and heating costs.
C. There is no real clear relationship between these variables.
D. There exists a direct relationship between inches of insulation and heating costs.
30) If we fit a linear trend to data that are growing exponentially,
A. the fitted trend will be too high at the end
B. the forecasts, if extrapolated, will be too low
C. the forecasts, if extrapolated, will be too high
D. the fitted trend will be too low in the middle
Submitted:
4 years ago.
Category:
Calculus and Above
Share this conversation
Expert:
Ryan
replied 4 years ago.
Hi,
Thank you for using JustAnswer.
Here are the solutions:
21. C
22. A
23. A
24. C
25. B
26. B
27. A
28. C
29. B
30. B
Thanks,
Ryan
Ask Your Own Calculus and Above Question
Share this conversation
JustAnswer in the News:
Askadoc 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 workfromhome 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
<
Previous

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
Meet The Experts:
SusanAthena
Master's Degree
Satisfied Customers:
102
Tutor for Algebra, Geometry, Statistics. Explaining math in plain English.
<
Last

Next
>
http://ww2.justanswer.com/uploads/homeworklady/20081124_125231_susannewavatar.jpg
SusanAthena's Avatar
SusanAthena
Master's Degree
Satisfied Customers:
102
Tutor for Algebra, Geometry, Statistics. Explaining math in plain English.
http://ww2.justanswer.com/uploads/ED/educatortech/201267_1256_williams4.64x64.jpg
Mr. Gregory White's Avatar
Mr. Gregory White
Master's Degree
Satisfied Customers:
98
M.A., M.S. Education / Educational Administration
http://ww2.justanswer.com/uploads/CO/CosumelEyes/201254_4923_Profile.64x64.jpg
Ray Atkinson's Avatar
Ray Atkinson
Bachelor's Degree
Satisfied Customers:
64
Innercity high school substitute teacher. Degrees in mathemetics, accounting, and education. Years and years of tutoring.
http://ww2.justanswer.com/uploads/AR/arubin9/201224_42617_ArthurRubinedit.64x64.jpg
Dr Arthur Rubin's Avatar
Dr Arthur Rubin
Doctoral Degree
Satisfied Customers:
58
Ph.D. in Mathematics, 1978, from the California Institute of Technology, over 20 published papers
http://ww2.justanswer.com/uploads/SO/sonofGauss/201266_20151_PortraitLHW.64x64.jpg
JACUSTOMERyrynbdjl's Avatar
JACUSTOMERyrynbdjl
Master's Degree
Satisfied Customers:
42
I have a MS in Mathematics and I have taught Mathematics for 10 years at the college level.
http://ww2.justanswer.com/uploads/dhouse1940/20100902_133023_DSCN2406.jpg
dhouse1940's Avatar
dhouse1940
Master's Degree
Satisfied Customers:
33
BS mathematics, MS biostatistics, 35+ yrs designing & analyzing biological experiments.
http://ww2.justanswer.com/uploads/DO/Donbacongamer/201236_2337_mathmaster.64x64.jpg
Don's Avatar
Don
Master's Degree
Satisfied Customers:
29
M.S. Astronautical Engineering. Math/Sci/Comp Tutor
Related Calculus and Above Questions
Question
Date Submitted
Statistics questions: Suppose you work for a university. You
7/29/2016
7/29/2016
Ryan
Mr. Glenn, I have some more math problems I need help with.
7/28/2016
7/29/2016
Mr. Glenn
In the week before and the week after a holiday, there were
7/27/2016
7/27/2016
Mr. Glenn
Last of them, I will miss our weekly talks!
7/25/2016
7/26/2016
Ryan
Afternoon, Thanks in advance! I hope you had a great weekend
7/25/2016
7/25/2016
Ryan
Glenn Only, These are a set of 8 questions. These are review
7/25/2016
7/25/2016
Mr. Glenn
Finite Math help due At 3:00 PM EST
7/22/2016
7/22/2016
Ryan
Glenn only. If you are able to help me with this assignment
7/22/2016
7/22/2016
Mr. Glenn
I need help with a math assignment that is due this Friday.
7/21/2016
7/23/2016
Mr. Glenn
I hope I 't wake you. I just wanted to drop this here before
7/20/2016
7/20/2016
Ryan
X
Ask a Tutor
Get a Professional Answer. 100% Satisfaction Guaranteed.
47 Tutors are Online Now
Type Your Calculus and Above Question Here...
characters left: