Centrummått

Introduktion till statistik

George Boorman

Curriculum Manager, DataCamp

Varför är centrummått användbara?

¹ Image credits: https://unsplash.com/@arnosenoner; https://unsplash.com/@brenoassis;

Borough	Burglary	Robbery	Theft	Vehicle Crime	Total
Barking and Dagenham	2318	1265	6300	4668	14551
Barnet	5067	1369	9875	9841	26152
Bexley	1583	444	4500	4216	10743
Brent	3893	1650	10026	7739	23308
Bromley	3053	844	8635	6966	19498
...	...	...	...	...	...

Borough	Burglary	Robbery	Theft	Vehicle Crime	Total
Barking and Dagenham	2318	1265	6300	4668	14551
Barnet	5067	1369	9875	9841	26152
Bexley	1583	444	4500	4216	10743
Brent	3893	1650	10026	7739	23308
Bromley	3053	844	8635	6966	19498
...	...	...	...	...	...

Var ligger datats centrum?

annotated_vehicle_offenses_histogram_asking_where_the_center_is.png

$${mean} = \frac{Sum\ of\ all\ values}{Count\ of\ all\ values} $$

$${Mean(Burglary)} =\frac{(2,318\ + 5,067\ + 1,583\ + 3,893\ +...)}{32} \ = \ 3,462.8125 $$

sorted_bar_plot_showing_burglary_values_by_borough_from_smallest_to_largest.png

sorted_bar_plot_showing_burglary_values_by_borough_from_smallest_to_largest_with_values_stated_for_the_two_middle_bars.png

${Median(Burglary)} =\frac{(3,304\ + 3,529)}{2}$

${Median(Burglary)} = 3,416.5 $

histogram_of_vehicle_crimes_with_mean_and_median_displayed_as_black_and_red_vertical_dotted_lines.png

robbery_histogram_with_black_dotted_line_for_mean_and_red_dotted_line_for_median.png

Introduktion till statistik