Data set

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A table of numbers, words or symbols; the values of which are often the results of an experiment or observations. Data sets almost always have several variables.

Usually the columns of the table consist of variables and the rows consist of values of each variable for individuals or values of each variable at different times.

Example 1 (Values for individuals)

The table below shows part of a data set resulting from answers to an online questionnaire from 727 students enrolled in an introductory Statistics course at the University of Auckland.

Individual Gender Birth month Birth year Ethnicity Number
of years
living in NZ
Number of
countries
visited
Actual
weight
(kg)
Ideal
weight
(kg)
1

2

3

.

.

.
female

female

male

.

.

.
Jan

Nov

Jan

.

.

.
1984

1990

1990

.

.

.
Other European

Chinese

NZ European

.

.

.
2

15

18

.

.

.
3

11

2

.

.

.
55

53

68

.

.

.
50

49

60

.

.

.

Example 2 (Values at different times)

The table below shows part of a data set resulting from observations at a weather station in Rolleston, Canterbury, for each day in November 2008.

Day Max temp (°C) Rainfall (mm) Max pressure (hPa) Max wind gust (km/h)
1

2

3

.

.

.
26.8

19.7

19.5

.

.

.
0.5

0.0

0.0

.

.

.
1015.1

1015.6

1011.1

.

.

.
70.3

38.9

29.6

.

.

.



Alternative: dataset

Curriculum achievement objectives references

Statistical investigation: Levels 3, (4), 5, (6), 7, 8