Lesson 4
Download
1 / 11

Inference and box plots - PowerPoint PPT Presentation


  • 96 Views
  • Uploaded on

Lesson 4. Inference and box plots. Focus . Inferring back to the population Box plots. Karekare College. PROBLEM. Do boys at Karekare College tend to have longer popliteal lengths than girls at Karekare college?. DATA. Sample of 30ish boys and 30ish girls from Karakare College.

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 'Inference and box plots' - don


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
Lesson 4

Lesson 4

Inference and box plots


Focus
Focus

  • Inferring back to the population

  • Box plots


Karekare college
Karekare College


Problem
PROBLEM

  • Do boys at Karekare College tend to have longer popliteal lengths than girls at Karekare college?


Inference and box plots
DATA

  • Sample of 30ish boys and 30ish girls from Karakare College


Analysis
ANALYSIS

  • I notice…

    • Write three I notice statements about this graph…


Analysis1
ANALYSIS

  • I notice… (describe what is happening in your samples)

  • I wonder… (inferential statement about what might be happening back in your population)


Box plot reminder
Box plot reminder

MEDIAN – halfway through ordered data

  • Mark the middle of all the values…

    • How do we find this?

    • Odd/even sample sizes?

    • What is the name of this STATISTIC?


Box plot reminder1

QUARTILES–quarter of the way through ordered data

Box plot reminder

  • Mark the middle of the bottom half and the middle of the top half…

    • How do we find this?

    • Median included or not?

    • What is the name of these STATISTICS?


Box plot reminder2
Box plot reminder

  • Join these three values up with a box

    • The middle value is a line through the box

  • Extend a line from the box to the smallest and largest values

  • Congratulations – you’ve made a box plot!


Box plot reminder3
Box plot reminder

  • Box plots split the data up into quarters

  • We often refer to the middle 50% which is the box part.