Nm reticl e units 01m m mm ru µ m ru 4x 01 10x 40x

nm}
Reticl
e
units/
0.1m
m
mm /
r.u.
µ m /
r.u.
4X 0.1 10X 40X 3,050 nm 4 ru
0.025
mm 25 µ m
10X 0.25 10X 100X 1,220 nm 10 ru
0.01
mm 10 µ m
40X 0.65 10X 400X 469 nm 40 ru
0.0025
mm
2 µ m
100X 1.25 10X 1000X 244 nm
100
ru
0.001
mm 1 µ m
Advantages / Disadvantages Wet mounts Dry mounts
Living/Dead Specimen
The living specimen was an
advantage when it comes to
viewing the cells and
structures.
The dead specimen was a
disadvantage when looking
at cell function.
Movement The movement of the living
specimen was a disadvantage
because it was hard to focus in
on and capture a good picture.
The dead specimen did not
move at all making it an
advantage. It was easy to
focus on and take a
picture.
Storage This is a disadvantage
because you cannot store and
reuse wet mount slides.
This is an advantage
because dry mounts are
easily stored and reused.
Staining Because you do not have to
stain the specimen to identify it,
this is an advantage.
**Could be seen as
disadvantageous because
stains are easier to detect.
This is a disadvantage
because time has to be
taken to stain the
specimen.
**Also could be seen as an
advantage because the
stain makes it easier to
identify the specimen.
Exercise 1 Page of
3 5

Group Members: _Taylor Miller, Erisha Tashakori, Yeon Park, Omar
Assali_____Exercise__Two_Date
: _02-05-2014_
LI ____Lin Qiu_____ Unique __49230___ Day: _Wednesday__ Room: _PAI 1.18___ Lab Start Time _1:30 pm__
(b)Include a digital image of Paramecia present in a permanent dry as well as a fresh wet mount.
Dry Mount Paramecia
Wet Mount Paramecia
(c)Based on the length measurements, do the Paramecia used for the permanent dry mount and the
sample of Paramecia used for the wet mount likely belong to the same species?
State the null hypothesis concerning these sets of measurements. Use the class data set to
perform a t-test and support your conclusion when explaining your answer. Provide the means,
standard deviations (including units) and p-values. Interpret the results.
(i)If the p-value indicates a statistically significant difference:
Can you reject the null hypothesis and infer that the two sets of measurements reflect a
real and meaningful difference? Can it be concluded that these two sets of Paramecia
really belong to two different species? Suggest an explanation for this difference.
(ii)If the p-value indicates a lack of a statistical difference:
Does this indicate that the null hypothesis has been confirmed? Explain your answer,
taking into account sample sizes, experimental design ( e.g ., wet vs. dry specimens), and
possible confounding factors.
•
•