Answer:
the overall mean mortality rate for the two regions is 1524.15
Step-by-step explanation:
Given that;
Summary of Mortality
Group Count Mean Median Std-Dev
North 34 1631.59 1631 138.470
South 27 1388.85 1369 151.114
the overall mean mortality rate for the two regions = ?
first we determine number of deaths in the North;
⇒ count × mean = 34 × 1631.59 = 55,474.06
Next, number of deaths in the South
⇒ count × mean = 27 × 1388.85 = 37,498.95
so, mortality rate for the two region will be;
⇒ (55,474.06 + 37,498.95) / ( 34 + 27 )
= 92,973.01 / 61
= 1,524.1477 ≈ 1524.15
Therefore, the overall mean mortality rate for the two regions is 1524.15
