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 Math-John Your Own Question

Math-John
Math-John, PhD in Statistics
Category: Calculus and Above
Satisfied Customers: 1298
Experience:  MS and BS in Math
Type Your Calculus and Above Question Here...
Math-John is online now
A new question is answered every 9 seconds

RA-mab

Customer Question

1. A formal statement that there is an absence of relationship between variables when tested by a researcher is called: (Points : 1)
Null hypothesis
Type I error
Type II error
Negative interval


2. Bivariate statistics refers to the statistical analysis of the relationship between two variables. (Points : 1)
True
False


3. Positive relationships between two variables indicate that, as the score of one increases, the score of the other increases. (Points : 1)
True
False


4. A result that is probably not attributable to chance is: (Points : 1)
Type I error
Type II error
Statistical significance
In the semi-quartile range


5. A score that is likely to fall into the middle 68% of scores of a normal distribution will fall inside these values: (Points : 1)
. +/- 3 standard deviations
+/- 2 standard deviations
+/- 1 standard deviation
semi-quartile range


6. It is important to assess the magnitude or strength of a relationship because this assists you with deciding whether or not a variable A causes variable B. (Points : 1)
True
False


7. In a negative relationship, as the score of one variable decreases, the score on the second variable decreases. (Points : 1)
True
False


8. A set of subjects, usually randomly sampled, selected to participate in a research study is called: (Points : 1)
Population
Sample
Mode Group
Partial Selection


9. A perfect negative relationship between two variables is expressed as r=0. (Points : 1)
True
False


10. When examining the relationship between a nominal variable and an interval or ratio variable, you would create a table using the nominal variables, calculate the mode and median of the interval or ratio variable, then make a decision regarding the relationship using the mode and median. (Points : 1)
True
False


11. A Z score of +/-1.96 is equivalent to these values on a normal distribution. (Points : 1)
Critical region
+/-1 standard deviation
+/-2 standard deviations
+/-3 standard deviations


12. An assumption used by statisticians which states that population parameters are normally distributed: (Points : 1)
Central Limit Theorem
Null Hypothesis
Statistical significance
Standard deviation


13. When examining the relationship between two interval or ration level variables, you can use a scatterplot to allow you to visualize the relationship between the two. (Points : 1)
True
False


14. Correlation coefficients, r, range from -1.00 to +1.00. (Points : 1)
True
False


15. An entire set of individuals or objects having some common characteristics is: (Points : 1)
Sample
Population
Median Group
Complete selection


16. Data which uses number values, has an equal distance between values, and has a possible absolute zero is: (Points : 1)
Interval
Nominal
Ordinal
Ratio


17. To determine the proportion of variability in one variable that can be accounted for or explained by the variability of a second variable, you would calculate a correlation coefficient, then square it. (Points : 1)
True
False


18. A significant finding with the 2 sample t-test indicates a strong relationship exists between the 2 population means. (Points : 1)
True
False


19. Data which uses number values with an equal distance between values are: (Points : 1)
Nominal
Ordinal
Normal
Interval


20. Data which uses numbers to provide categories or labels as well as the ordering of the categories are: (Points : 1)
Nominal
Ordinal
Ratio
Interval


21. Not all variables retained in a regression model are required to be significant. (Points : 1)
True
False


22. Parametric tests can be used with any type of data. (Points : 1)
True
False


23. This term refers to how data spreads out or disperses within a distribution. (Points : 1)
Variability
Critical region
Range
Mode


24. Relevant data that are expressed in numerical form are called: (Points : 1)
Qualitative data
Quantitative data
Standard data
Multiplicative data


25. It is not necessary to look at the frequency distribution if the mean, median, and mode are known. (Points : 1)
True
False


26. Causation is synonymous with association. (Points : 1)
True
False


27. The area of the theoretical distribution where the researcher will reject the null hypothesis is called: (Points : 1)
+/- 1 standard deviation
Semi-quartile range
Critical region
Standard deviation


28. The arithmetic average of the data is called the: (Points : 1)
Mean
Median
Mode
Var
Submitted: 1 year ago.
Category: Calculus and Above
Expert:  Math-John replied 1 year ago.

Hi, welcome.

 

I will be happy to help you with these questions. Before proceeding, can you rate my answer for your last post? I can only be compensated if my answer is rated. Thanks.

 

John

Customer: replied 1 year ago.

ok can you also add these questions


 









 









29. Regression uses the least squares method to fit a model. (Points : 1)



True
False



 









 









30. The difference between the highest and lowest score in a distribution is called: (Points : 1)



Semi-quartile range
Range
Mean
Median



 









 









31. This is the measurement of dispersion equal to the square root of the mathematical variance. (Points : 1)



Mean
Median
Standard deviation
Range



 









 









32. This is used to compare means while controlling for the effect of a covariate. (Points : 1)



ANOVA
RANOVA
ANCOVA
Dependent t-test



 









 









33. The assumptions for ANCOVA differ substantially from those for ANOVA. (Points : 1)



True
False



 









 









34. When the researcher incorrectly rejects the null hypothesis, it is known as: (Points : 1)



Hypothesis error
Statistical significance
Type I error
Type II error



 









 









35. You are studying the effect of hypnosis on weight loss. You will measure each patient's weight pre- and post-intervention. The most appropriate test is: (Points : 1)



One sample t-test
MANOVA
ANCOVA
Dependent groups t-test



 









 









36. What is the minimum level of measurement appropriate for the independent variable in a t-test? (Points : 1)



Nominal
Ordinal
Interval
Ratio



 









 









37. ANOVA assumes which of the following? (Points : 1)



Random sampling
Normal distribution
Dependent variable is at least interval
Three or more groups of independent variable
All of the above



 









 









38. Public Health nurses want to compare the mean weight of US 6th graders to a sample of 6th graders in one school. Which statistical test is most appropriate (Points : 1)



One-sample t-test
ANOVA
ANCOVA
Independent t-test



 









 









39. A group of neonatal nurses wanted to know if there was a difference in mean heart rate between premature babies who were swaddled and babies who were not swaddled. Babies were randomly assigned to swaddling or no swaddling. Which test is most appropriate? (Points : 1)



One sample t-test
ANCOVA
Independent t-test
Logistic regression



 









 









40. Psych nurses wanted to evaluate the effect of three different treatments for anxiety - positive imagery, therapeutic touch, and medication on anxiety score (interval data) while controlling for the effect of length of stay. Which test is most appropriate? (Points : 1)



ANOVA
ANCOVA
Independent t-test
Paired t-test



 









 









41. Critical care nurses wanted to evaluate the effect of heparin vs saline IV flush solution on IV patency (patent vs not patent). Which test is most appropriate? (Points : 1)



One sample t-test
Independent t-test
Chi-square test
ANOVA



 









 









42. A nurse researcher wanted to evaluate blood pressure in a set of patients/research subjects at 1, 3, and 6 months. What test would be most appropriate? (Points : 1)



Independent t-test
ANVOVA
RM-ANOVA
ANCOVA



 









 









43. In a study that examines the effect of a peer mentor on the heart rate of patients, what is the dependent variable? (Points : 1)



Peer mentoring
Emotional status
Heart rate
Patients



 









 









44. A variable with equal distances between score units which also has a true meaningful zero is: (Points : 1)



Ordinal
Cardinal
Ratio
Nominal



 









 









45. The standard deviation is: (Points : 1)



The difference between the 3rd and 1st quartile.
The squared deviations from the mean.
The difference between the highest and lowest scores.
The square root of the variance.



 









 









46. If a researcher accepts a null hypothesis when that hypothesis is actually true, she has committed: (Points : 1)



a type I error
a type II error
no error
a causation



 









 









47. Chi-square tests can be conducted for a 4X3 contingency table. (Points : 1)



True
False



 









 









48. This is used when a conservative approach is desired and an expected cell frequency is less than 5 in a 2X2 table. (Points : 1)



Fisher's exact test
Cramer's V
Yates' correction
Regression



 









 









49. The distribution of chi-square values is NOT normally distributed. (Points : 1)



True
False



 









 









50. Generally, an ANOVA test is used when 3 or more variables are compared. (Points : 1)



True
False


Expert:  Math-John replied 1 year ago.
Thank you for the highest rating and bonus for the previous post. Yes I can answer all these questions. I will start working on these questions now and post the answer as soon as possible.
Customer: replied 1 year ago.

thank you. if you can give it to me within the hour or less i would appreciate it. thanks

Expert:  Math-John replied 1 year ago.
OK I will post the answer in 1 hour.
Expert:  Math-John replied 1 year ago.
The answer can be downloaded here. Thanks.
Math-John, PhD in Statistics
Satisfied Customers: 1298
Experience: MS and BS in Math
Math-John and other Calculus and Above Specialists are ready to help you
Expert:  Math-John replied 1 year ago.
Thank you for the highest rating and bonus. You may request me by beginning your questions with "For John Only".

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
 
 
 

Meet The Experts:

 
 
 
  • Mr. Gregory White's Avatar

    Mr. Gregory White

    Master's Degree

    Satisfied Customers:

    90
    M.A., M.S. Education / Educational Administration
< Last | Next >
  • http://ww2.justanswer.com/uploads/ED/educatortech/2012-6-7_1256_williams4.64x64.jpg Mr. Gregory White's Avatar

    Mr. Gregory White

    Master's Degree

    Satisfied Customers:

    90
    M.A., M.S. Education / Educational Administration
  • http://ww2.justanswer.com/uploads/homeworklady/2008-11-24_125231_susannewavatar.jpg SusanAthena's Avatar

    SusanAthena

    Master's Degree

    Satisfied Customers:

    86
    Tutor for Algebra, Geometry, Statistics. Explaining math in plain English.
  • http://ww2.justanswer.com/uploads/SO/sonofGauss/2012-6-6_20151_PortraitLHW.64x64.jpg JACUSTOMER-yrynbdjl-'s Avatar

    JACUSTOMER-yrynbdjl-

    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/dhouse1940/2010-09-02_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/CO/CosumelEyes/2012-5-4_4923_Profile.64x64.jpg Ray Atkinson's Avatar

    Ray Atkinson

    Bachelor's Degree

    Satisfied Customers:

    30
    Degrees in Math, Education and Accounting, years and years of tutoring.
  • http://ww2.justanswer.com/uploads/DO/Donbacongamer/2012-3-6_2337_mathmaster.64x64.jpg Don's Avatar

    Don

    Master's Degree

    Satisfied Customers:

    29
    M.S. Astronautical Engineering. Math/Sci/Comp Tutor
  • http://ww2.justanswer.com/uploads/AR/arubin9/2012-2-4_42617_ArthurRubinedit.64x64.jpg Dr Arthur Rubin's Avatar

    Dr Arthur Rubin

    Doctoral Degree

    Satisfied Customers:

    26
    Ph.D. in Mathematics, 1978, from the California Institute of Technology, over 20 published papers