examining the relationship between two variables n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Examining the Relationship Between Two Variables PowerPoint Presentation
Download Presentation
Examining the Relationship Between Two Variables

Loading in 2 Seconds...

play fullscreen
1 / 10

Examining the Relationship Between Two Variables - PowerPoint PPT Presentation


  • 105 Views
  • Uploaded on

Examining the Relationship Between Two Variables. (Bivariate Analyses). What type of analysis?. We have two variables X and Y and we are interested in describing how a response (Y) is related to an explanatory variable (X).

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Examining the Relationship Between Two Variables' - dagan


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
what type of analysis
What type of analysis?
  • We have two variables X and Y and we are interested in describing how a response (Y) is related to an explanatory variable (X).
  • What graphical displays do we use to show the relationship between X and Y ?
  • What statistical analyses do we use to summarize, describe, and make inferences about the relationship?
fit y by x in jmp
Fit Y by X in JMP

Y nominal/ordinal Y continuous

X continuous X nominal/ordinal

example low birthweight study
List of Variables

id – ID # for infant & mother

headcir – head circumference (in.)

leng – length of infant (in.)

weight – birthweight (lbs.)

gest – gestational age (weeks)

mage – mother’s age

mnocig – mother’s cigarettes/day

mheight – mother’s height (in.)

mppwt – mother’s pre-pregnancy

weight (lbs.)

fage – father’s age

fedyrs – father’s education (yrs.)

fnocig – father’s cigarettes/day

fheight – father’s height

lowbwt – low birthweight indicator

(1 = yes, 0 = no)

mage35 – mother’s age over 35 ?

(1 = yes, 0 = no)

smoker – mother smoked during preg.

(1 = yes, 0 = no)

Smoker – mother’s smoking status

(Smoker or Non-smoker)

Low Birth Weight – infant birthweight

(Low, Normal)

Example: Low Birthweight Study
example low birthweight study birthweight vs gestational age
Example: Low Birthweight Study(Birthweight vs. Gestational Age)

Y = birthweight (lbs.) Continuous

X = gestational age (weeks)Continuous

example low birthweight study birthweight vs mother s smoking status
Example: Low Birthweight Study(Birthweight vs. Mother’s Smoking Status)

Y = birthweight (lbs.) Continuous

X = mother’s smoking status (Smoker vs. Non-smoker)

Nominal

example low birthweight study birthweight status vs mother s cigs day
Example: Low Birthweight Study(Birthweight Status vs. Mother’s Cigs/Day)

Y = birthweight status(Low, Normal)Nominal

X = mother’s cigs./day Continuous

P(Low|Cigs/Day)

example low birthweight study birthweight status vs mother s smoking status
Example: Low Birthweight Study(Birthweight Status vs. Mother’s Smoking Status)

Y = birthweight status(Low, Normal)Nominal

X = mother’s smoking status (Smoker, Non-smoker)Nominal