Question 4 does the convenience sample give us an

Question 4. Does the convenience sample give us an accurate picture of the salary of the full population?
Would you expect it to, in general? Before you move on, write a short answer in English below. You can refer
to the statistics calculated above or perform your own analysis.

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Simple random sampling
A more justifiable approach is to sample uniformly at random from the players. In a simple random sample
(SRS) without replacement , we ensure that each player is selected at most once. Imagine writing down
each player's name on a card, putting the cards in an box, and shu ffl ing the box. Then, pull out cards one by
one and set them aside, stopping when the specified sample size is reached.
Producing simple random samples
Sometimes, it’s useful to take random samples even when we have the data for the whole population. It
helps us understand sampling accuracy.
sample
The table method sample produces a random sample from the table. By default, it draws at random with
replacement from the rows of a table. It takes in the sample size as its argument and returns a table with
only the rows that were selected. The optional argument with_replacement=False specifies that the
sample should be drawn without replacement.
Run the cell below to see an example call.
In [40]: # Just run this cell
salary_data . sample( 5 , with_replacement = False )
Question 5. Produce a simple random sample of size 44 from full_data . Run your analysis on it again.
Run the cell a few times to see how the histograms and statistics change across di ff erent samples.
How much does the average age change across samples?
What about average salary?
Out[40]:
PlayerName Salary
Brook Lopez 15719063
Jimmer Fredette 948163
Danny Granger 2077000
Miles Plumlee 1169880
Danny Green 4025000

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