Statistics Flashcards
First stage of experimentation?
Form hypothesis.
Second stage of experimentation?
Test hypothesis.
Third stage of experimentation?
Analyze results.
Fourth stage of experimentation?
Draw conclusions.
When are statistics used during experimentation?
Analyzing results.
We organize and analyze data to…
draw conclusions from it.
null hypothesis
assumption that there will be no difference between groups
alternate hypothesis
assumption that there will be a difference between groups
If there is a significance difference between the groups, we…
reject the null hypothesis and accept and alternate hypothesis.
quantitative data
numerical measurements or quantities
qualitative data
categorical measurements
population
large group that would be difficult to experiment on
sample
small subset of a population that can be experimented on
descriptive statistics
describes our data by looking at certain trends/patterns throughout a sample
inferential statistics
makes generalization to a larger population with the data from a sample
Descriptive statistics are measures of…
central tendency and variablility.
measures of central tendency
single statistic that best describes the center of a distribution of data
Examples of measures of central tendency are…
mean, median, and mode.
measures of variability
statistics that tell us how different the data are from each other
Examples of measures of variability are…
range and standard deviation.
mean
most representative number from a dataset
standard deviation
amount of variance around the mean; how different the numbers are
Normal distribution is represented by…
a bell curve.
Descriptive statistics describe…
our data using measures like mean and standard deviation.