chap3 - Chap 3 Random Sampling Probability and the Binomial...

Info icon This preview shows pages 1–4. Sign up to view the full content.

1 1 Chap 3: Random Sampling, Probability, and the Binomial Distribution Chapter 3 2 Review of Chap. 2 2.1 Frequency Plots – How to organize your data and display it? Categorical data – Bar chart Quantitative data z Stem-and-Leaf Diagrams z Histogram & interpretation 2.2 How to summarize your data? Visual Summary of Data z Shapes of Frequency Distribution z ( Mode, symmetry, skewness) Quantitative Summary
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

2 3 Review: How to summarize your data? Quantitative Summary: z Measure of Center Parameter vs. statistics, sample mean, sample median, and the visualization of their relationships. z Modified Boxplot , Quartiles Quartiles (Q1, Q2, Q3), five-number summary, lower fence, upper fence, modified boxplot, parallel boxplot z Measure of Dispersion (how spread is your data) Range, IQR, sample SD, sample variance visualizing those measures of dispersion (range, IQR, SD) and compare them. 4 Visualizing Measures of Dispersion z Range : min Æ max, cover 100% of data Intuitive, but poor for extreme tails of dist z IQR: spread of middle 50% of the data In histogram, Q 1 , Q 2 , Q 3 divide the area under the bars into 4 equal parts. Intuitive, resistant to extreme tails More challenging to estimate in statistics z SD: Less intuitive, may subject to extreme tails of the data Nice statistical property
Image of page 2
3 5 Visualize SD z If sample data is approximately asymmetric and bell shaped (as in the textbook, “unimodel, not too skewed, tails are not overly long or short”), then 6 Visualize SD (mean, SD) is the foundation of Classical Statistics.
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern