Question

this passage describes body length in northern water snakes.
the northern water snake can swim! these snakes hunt and eat small fish. in habitats with many fish, northern water snakes are well - fed. they can grow longer than snakes that are not well - fed.
a northern water snake
the table below describes a possible population of northern water snakes at the start of a period of time and at the end of that period. the table shows body length measurements for a representative sample of the population at the start and for another representative sample at the end.
complete the table.
data from representative samples of a population of northern water snakes

point in time	list of body length measurements (mm)	average body length (mm)
end	746, 754, 755, 765, 769, 770, 782, 795

Explanation:

Step1: Sum start measurements

$507 + 520 + 525 + 531 + 532 + 544 + 553 + 564 + 568 + 606 = 5450$

Step2: Calculate start average

$\frac{5450}{10} = 545$

Step3: Sum end measurements

$746 + 754 + 755 + 765 + 769 + 770 + 782 + 795 = 6136$

Step4: Calculate end average

$\frac{6136}{8} = 767$

Answer:

Start average: 545
End average: 767

Completed table values:

Point in time	List of body length measurements (mm)	Average body length (mm)
End	746, 754, 755, 765, 769, 770, 782, 795	767