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SURVIVORSHIP LAB

SURVIVORSHIP LAB. October 24, 2013. Raw Data. Each pair of you will transfer your data to a master sheet There are six master sheets; one for each gender and century – be sure to transfer your data to the correct sheets!

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SURVIVORSHIP LAB

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  1. SURVIVORSHIP LAB October 24, 2013

  2. Raw Data

  3. Each pair of you will transfer your data to a master sheet There are six master sheets; one for each gender and century – be sure to transfer your data to the correct sheets! The number of deaths you recorded in each cohort is written in the 2nd column of the master sheet

  4. Master Sheet - Cemetery Data Analysis

  5. Completing the Third column of the Master Sheet Top of third column – number surviving at beginning of cohort: • This value is the total in the population; if there were 27 males TOTAL counted in the 18th century, the first cell = 27 • 2nd cell in third column – number remaining after deaths in 0 – 4.9 cohort: • If 2 males died between 0 – 5 years of age, subtract 2 from 27; the value in the 2nd cell would = 25 • Continue completing the remainder of the third column

  6. Completing the Fourth Column of the Master Sheet • The first cell (0 – 4.9) = 1.00 • This is the fraction of the number surviving at birth; in other words, everyone in the cemetery was alive, at least for a little while… • The 2nd cell = the total in the population / the number who survived in the 5 – 9.9 cohort • The 3rd cell = the total in the population / the number who survived in the 10 – 14.9 cohort • Total in the population is one value, used for the entire population, i.e. 18th century males

  7. Completing the Fifth Column of the Master Sheet • This is the MORTALITY RATE • Number dying during cohort / number surviving at beginning of cohort • Column 2 / column 3 at each cohort • This can be expressed as a decimal, or as a percentage Example: if there were 27 males and 2 died in the 0 – 4.9 cohort, then 2/27 = 0.074 or 7.4%

  8. Drawing a Survivorship Curve • X – axis = cohort (first column) • Y – axis = number surviving at beginning of cohort (third column) Draw survivorship curves for each of the 6 populations!

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