Question

Which formula correctly represents the calculation of survival rate for a population?

Options

• (Number alive at end of period) / (Number alive at start of period)

• (Number of deaths during the year) / (Total population at start)

• (Number of births during the year) / (Total population at end)

• (Birth rate - Death rate)

Answer 1

(Number alive at end of period) / (Number alive at start of period)

Explanation:

Survival rate is calculated by dividing the number of individuals surviving at the end of a period by those alive at the start.​