Suicides are most common between the ages of 5 and 54. This table shows the number of suicides and the number of total deaths in the United States in 2001 for various age groups.
a. Which variable was originally quantitative and transformed into categorical by grouping values?
b. For which two of these age groups is the probability of death by suicide the highest?
c. For which two of these age groups is the probability of death by suicide the lowest?
d. The five probabilities in this situation can be written as proportions; are they statistics or parameters? e. Should the five proportions be denoted p1 to p5 or to ?