Progress Check

Use this activity to assess whether you and your peers can:

• Calculate the Z-score for a sample proportion.
• Use probability to interpret the Z-score for a sample proportion.
• Identify usual and unusual sample proportions in a sampling distribution.

Prompt

In the 2008 presidential election, newspapers reported that Obama received 40% of the white male vote. If this is true, what is the probability that a random sample of 200 white male voters had less than 35% voting for Obama?

Drag the orange flag left or right to change the Z-score. Alternatively, enter a Z-score into the textbox and click enter.