Chapter Questions
Collecting and describing a categorical variable. Find data for a categorical variable in which you are interested. Get those data into a format that can be read by the statistical software that you are using. Produce a frequency table and describe what you see.
Collecting and describing a continuons variable. Find data for a continuous variable in which you are interested. Get those data into a format that can be read by the statistical software that you are using. Produce a table of descriptive statistics and either a histogram or a kernel density plot. Describe what you have found out from doing this.
In Table 6.1 , why would it be problematic to calculate the mean value of the variable "Religious Identification"?
Moving from mathematical formulae to textual statements. Write a sentence that conveys what is going on in each of the following equations:(a) $Y=3 \forall X_i=2$.(b) $Y_{\text {total }}=\sum_{i=1}^n Y_i=n \bar{Y}$.
Computing means and standard deviations. Table 6.3 contains the median income for each of the 50 US states for the years 2004-2005. What is the mean of this distribution, and what is its standard deviation? Show all of your work.