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LSP 121 -- 9/14/10

 

Review Questions

  1. What does PASW/SPSS stand for?

    Ans: Predictive Analytics Software / Statistical Package for the Social Sciences

  2. Compute Q0, Q1, Q2, Q3, Q4, and IQR for this dataset by hand:

    Ans: Q0=13, Q1=40, Q2=43, Q3=56.5, Q4=195.

  3. Draw the histogram defined by this table.

    Bin Frequency
    [0,1) 2
    [1,2) 5
    [2,3) 7
    [3,4] 1

    Ans:

  4. Who was John Tukey?

    Ans: A mathematician and statistician that taught at Princeton. He lived from 1915 to 2000.

  5. What does "Tukey's Hinges" mean?

    Ans: It is a method for easily determining Q1 and Q3: Q1 is the median of the bottom half of the sorted list; Q3 is the median of the top half of the sorted list. If the list has an odd number of items, the middle item is counted in both halves of the list.

  6. How do you find the following using SPSS?

    Ans: Analyze >> Descriptive Statistics >> Explore. Check Percentiles in addition to Descriptive Statistics.

 

Stem Plots

 

Boxplots

 

Collect Data for Homework 1

 

Activity 2