Bio 123- Midterm Exam With Complete
Solutions Latest Update
independent varaible
the variable that is being tested and can be changed on purpose by an experimenter
dependent variable
the variable that may change and is measured during the experiment (time, growth,
distance, etc)
control variable
a variable that is not changed and remains constant throughout the whole experiment
null hypothesis
no change or effect
alternative hypothesis
change or effect due to phenomenon under study
nt test
compares the averages for two groups to say whether the groups can be considered
different
, p value
the probability of observing a difference between means as large as the one you see in
the data
alpha
is normally set at .05 and if the p value is < 'a' we conclude groups are statistically
significant and if the p value is > the mean of the groups is statistically in significant
reject the null hypothesis
if you had a p-value of less than .05, meaning that the two groups are not different
accept the null hypothesis
p value greater than .05, meaning the two groups are actually different
sample size
The number of subjects used in an experiment or study. Generally, the larger the better.
degrees of freedom
(sample size) n-1
mean
average
Solutions Latest Update
independent varaible
the variable that is being tested and can be changed on purpose by an experimenter
dependent variable
the variable that may change and is measured during the experiment (time, growth,
distance, etc)
control variable
a variable that is not changed and remains constant throughout the whole experiment
null hypothesis
no change or effect
alternative hypothesis
change or effect due to phenomenon under study
nt test
compares the averages for two groups to say whether the groups can be considered
different
, p value
the probability of observing a difference between means as large as the one you see in
the data
alpha
is normally set at .05 and if the p value is < 'a' we conclude groups are statistically
significant and if the p value is > the mean of the groups is statistically in significant
reject the null hypothesis
if you had a p-value of less than .05, meaning that the two groups are not different
accept the null hypothesis
p value greater than .05, meaning the two groups are actually different
sample size
The number of subjects used in an experiment or study. Generally, the larger the better.
degrees of freedom
(sample size) n-1
mean
average
