Which graph is the best for showing means?

What percent of students have black eyes?

How would you describe this distribution?

What percent of students have brown eyes?

Statistical methods are classified into two major categories: descriptive statistics and inferential statistics. In your own words (do not just recite the definition from the book), describe the general purpose of, or use for, each category.

The Bigfoot Field Researchers Organization (www.bfro.net) maintains a database of bigfoot/Sasquatch sightings and related reports. According to the BFRO database as of January 2011 the mean number of reports per county in the state of Washington is 12.59 (standard deviation = 14.19). Here are the z-scores for three specific counties: Whitman County: z = -0.89    Cowlitz County: z = -0.03      Skamania County: z = +2.78   Which of these three counties is most representative of the typical county in Washington in terms of the number of Bigfoot reports?

For the following frequency distribution, what is

Imagine that we have a normal distribution of Exam scores for Psychology 210 with a mean of 75 and a standard deviation of 5. If I randomly drew a score of 60, would this be surprising? Explain your answer.

For the following distribution, what is the highest score?X               f20-24    215-19    510-14    4 5-9         1

If the SS = 15 with a sample size of 3, what is the population variance?