1. Data Summary
Sample Size (n): 48 individuals in the Class of 1930.  Two male members (Charles Hindla and Charles W. Mantha) were killed in WWII at ages 31 and 32, respectively.  They are included in this first data summary.

Range of ages at death: 31 to 105 years

Mean (Average) Age of Death: 74.27 years

Median Age of Death: 78 years

Mode: 77, 82, 83, 92, 96 (each occurring 3 times)

Standard Deviation: 16.29 years (indicates significant variability in ages of death)

2. Distribution Analysis
Histogram: The distribution of ages of death is slightly right-skewed, with most individuals dying in their 70s and 80s, but a few outliers at younger ages (e.g., 31, 32, 36, 38).

Box Plot: The box plot shows a concentration of ages between approximately 68 and 86 years, with several outliers below 50 years and one outlier at 105 years.

Skewness: The data is slightly right-skewed due to the presence of younger ages of death.

3. Central Tendency and Variability
Quartiles:

Q1 (25th percentile): 68 years

Q2 (Median, 50th percentile): 78 years

Q3 (75th percentile): 84 years

Interquartile Range (IQR): 84 – 68 = 16 years

Outliers: Ages below 68 – 1.516 = 44 years or above 84 + 1.516 = 108 years. Outliers in this dataset include 31, 32, 36, 38, 44, and 105.

4. Survival Analysis
Life Expectancy: The mean age of death is 74.27 years.

Survival Curve: A survival curve would show a gradual decline in the percentage of the class surviving as age increases, with a steeper decline after age 80.