This Statistics Module lesson is for a beginner. Read the short notes, run each example, then change one name or number and run it again.
statistics.mean, median, mode, pstdev, and stdev describe a list of numbers.
They are part of Python. You do not install them.
Example 1: Start here
pstdev is for a full set. stdev is for a sample.
import statistics # load a tool that comes with Python
marks = [71, 82, 82, 90] # a list; the values stay in this order
print(statistics.mean(marks))
print(statistics.median(marks))
Example 2: Store the idea in a name
Statistics Module begins with a value you can point at. The name topic holds that text.
topic = "Statistics Module" # text
print(topic)
Example 3: Check it with if
An if chooses one branch. Change the score and run it again to see the other message.
score = 34 # a whole number
if score >= 80: # run the indented lines only when this is true
print("Pass")
else: # runs when the test above was false
print("Try again")
Example 4: Repeat with a loop
A for loop runs the indented line once per step. The numbers 1, 2, and 3 are printed on their own lines.
for step in range(1, 4): # repeat once per number; range stops before the last
print("Step", step) # a comma prints each value, with a space between
pstdev is for a full set. stdev is for a sample.
