LAB EVAL 1 (LAB DISCOVERY) EXAM
QUESTIONS WITH CORRECT ANSWERS
Why is it important for all scientists to use a standard system of measure rather than the
system that may be most popular in their home region - ANSWER-so if a person not
from where the scientists is from the experiment can be accurately repeated
Do you lose or gain information when you use statistics to reduce a population to a few
characteristic numbers - ANSWER-you lose info, data can only be approximated
Suppose that you made repeated measurements of your height, if you used good
technique, would you expect the range to be large or small - ANSWER-the range would
be small bc there is no extreme measurements
Suppose that a biologist states that the average height of undergraduate students at
your university is 205 cm plus or minus a standards deviation of 17 cm. What does this
mean? - ANSWER-they are around 205 cm, they can be 17 cm shorter or 17 cm taller
What does a small standard deviation signify? What does a large standard deviation
signify? - ANSWER-a small sd means the data is close to the mean, a large sd shows
the data is spread out over more values
Is it possible to make a perfectly precise measurement - ANSWER-no
When in our everyday lives do we NOT want a precise measurement? - ANSWER-
cooking
What are the advantages of knowing the diameter of a field of view at a given
magnification - ANSWER-you can estimate the size of a specimen
Why must specimens viewed with a compound microscope be thin, why are they
sometimes stained with dye - ANSWER-so they can be seen through, show different
parts of cells and structures
Why is depth of field important in studying biological structures, how can it affect your
ability to find and examine a specimen - ANSWER-it allows you to see different areas of
the specimen since it's 3d some areas will be harder to see and a fine focus could be
used
What is the importance of adjusting the light intensity when viewing specimens with a
compound microscope - ANSWER-at higher magnification the light dims and can be
hard to see the specimen
Oculars - ANSWER-magnifies image
QUESTIONS WITH CORRECT ANSWERS
Why is it important for all scientists to use a standard system of measure rather than the
system that may be most popular in their home region - ANSWER-so if a person not
from where the scientists is from the experiment can be accurately repeated
Do you lose or gain information when you use statistics to reduce a population to a few
characteristic numbers - ANSWER-you lose info, data can only be approximated
Suppose that you made repeated measurements of your height, if you used good
technique, would you expect the range to be large or small - ANSWER-the range would
be small bc there is no extreme measurements
Suppose that a biologist states that the average height of undergraduate students at
your university is 205 cm plus or minus a standards deviation of 17 cm. What does this
mean? - ANSWER-they are around 205 cm, they can be 17 cm shorter or 17 cm taller
What does a small standard deviation signify? What does a large standard deviation
signify? - ANSWER-a small sd means the data is close to the mean, a large sd shows
the data is spread out over more values
Is it possible to make a perfectly precise measurement - ANSWER-no
When in our everyday lives do we NOT want a precise measurement? - ANSWER-
cooking
What are the advantages of knowing the diameter of a field of view at a given
magnification - ANSWER-you can estimate the size of a specimen
Why must specimens viewed with a compound microscope be thin, why are they
sometimes stained with dye - ANSWER-so they can be seen through, show different
parts of cells and structures
Why is depth of field important in studying biological structures, how can it affect your
ability to find and examine a specimen - ANSWER-it allows you to see different areas of
the specimen since it's 3d some areas will be harder to see and a fine focus could be
used
What is the importance of adjusting the light intensity when viewing specimens with a
compound microscope - ANSWER-at higher magnification the light dims and can be
hard to see the specimen
Oculars - ANSWER-magnifies image
