Lab Practical #1 Flashcards
What is the difference between continuous and discrete data
discrete- specific units, cannot be a decimal
continuous- over a range, can be a decimal
interval vs. ratio scales
interval scales- meaningless zero, the values (temperature for example) can be below zero
ratio scales- meaningful zero, weight cannot be negative therefore 0 has significance
where do titles go on tables vs. figures
tables- above
figures- below
name the four steps to the scientific method
- observations
- prediction/ hypothesis
- experiment
- accept or reject
what is the difference between a prediction and a hypothesis
a prediction stems from a hypothesis,
hypothesis definition
an explanation to your observations
control vs. experimental group
control- all other normal frogs
experimental- trained frogs being tested
null hypothesis
hypothesis you are trying to prove wrong
two terms or calculations that can be used for central tendency
mean and median
a t-test is used
to determine if two data sets are significantly different, to see if two means are different
paired vs unpaired t test
paired t-test- before and after of same 10 people
unpaired t-test- two different groups of 10 people
Which is based on your hypothesis, paired or unpaired or one or two tailed
TAILED
one tailed t-test
difference between the same 10 people, just looking at trained frogs
two-tailed t-test
two different sets of people, looking at the difference between the trained and untrained frogs
how to determine if two data sets are different
if tstat > tcritical, and if the p < 0.05, want a small p-value
Name the three components to the microscope that you can control
magnification, illumination, and contrast
Name the component of microscopes that you cannot control
resolution- being able to distinguish things as separate, want a higher resolution
