Lab 3: BioStatistics Flashcards
What are descriptive characteristics in Biostatistics?
- mean
- median
- standard deviation
What is MEAN?
the average
What is the MEDIAN?
the middle
Which descriptive characteristics will be used in the results section?
mean and standard deviation
Which descriptive characteristics will be used in the graph?
mean and standard error
What is the inferential statistic that was used in this lab?
The students T test
What is the students T test?
IV has 2 categories and the DV is continuous
What is a discrete variable?
variable that is categorical
What is the continuous variable?
variable that range
What is the continuous variable?
variable that range
What does the variable H0 stand for?
the null hypothesis
What variable goes on the x-axis?
the independent variable
If your independent variable is nomial, what is the best way to present that data?
with a bar graph
What is the variance?
squared deviations from the mean
What is the standard deviation?
the measure of deviation in the same units as the mean
if p>0.05 we ____________
support H0 and reject H1
if p<0.05 we _____________
reject H0 and support H1
There is no significant difference between the mass of shells from Beach A and Beach B is an example of what?
null hypothesis
If there is a significant difference between shell mass due to predation, then we will see a difference between the masses from beach A and beach B?
hypothesis
How do we write a results statement?
variable 1 (average+/- standard deviation) was significantly greater than variable 2 (averaeg+/-standard deviation) in the experiment (T value, Nvariable1, Nvariable2, p<0.05, p=x)
when would you use a two-tailed T test? one tailed?
2: if you think you know the direction
1: if you do not know the direction
what are the required variables of a graph?
title, x, y, DV, standard error, and means
can you prove a hypothesis?
no
