## Group Exercise: Z-test

Calculate the Z-test and determine the probability of the following outcomes. The mean occupational prestige score in Kings County in 2013 is 44.8. The population standard deviation is 18.3. Each group will demonstrate their work on the whiteboard.

You can compute the area under the normal curve here: http://www.stat.berkeley.edu/~stark/SticiGui/Text/clt.htm#normal_curve

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## Group Exercise: Standard Scores

Calculate the standard score (Z) and determine the probability for the following conditions. The mean hourly wage for New Yorkers with a college degree is $18.25. The population standard deviation is $11.80. Each group will demonstrate their work on the whiteboard.

You can compute the area under the normal curve here: http://www.stat.berkeley.edu/~stark/SticiGui/Text/clt.htm#normal_curve

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## Examination 1 Update

I've updated the exam to reflect questions about ANES. I also deleted one of the questions because we didn't cover odds and the odds ratio yet.

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## Group Exercise: Dispersion

Compute the standard deviation and IQR for a numeric variable. Interpret the results.

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## Group Exercise: Central Tendency, Mode

Compute the central tendency for a categorical variable. Interpret the results.

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## Group Exercise: Central Tendency, Median and Mean

Compute the central tendency for a relevant variable from the ANES 2016. Interpret the results.

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## Group Exercise: Sampling

Each group will design a sampling strategy for a hypothetical social research project. First, identify the study population. Next, discuss how you could draw a sample from that population. Indicate *what strategy you would choose -- purposive or probability -- briefly how you would construct the sample,* and *why that strategy is the best practical one for the study*. (Do not discuss how you would conduct the study itself; this exercise is just about sample design.)

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## Class Exercise: More Percentage Tables

Identify another categorical variable in the 2016 ANES. Compute a percentage table. Interpret the results.

Copy your R code and your interpretation into a comment on this page.

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## Class Exercise: Data Types

Write R code to create a scalar, a vector, and a matrix. How do these structures appear if you print them?

Write R code to perform a logical test. Now, assign the results of that logical test to a new variable. What happens when you print that new variable?

Paste your R code into a comment to this page.

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## Class Exercise: Percentage Tables

Identify a categorical variable in the 2016 ANES. Compute a percentage table. Interpret the results.

Copy your R code and your interpretation into a comment on this page.

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