# Statistics Worksheet

1) A council intends to study the digital literacy of its resident senior population (over 65years), so it questioned in person 24 inhabitants randomly chosen from a database of the
entire resident population, collecting, among others, the number of digital equipment to
which it has access.
Choose the right options for each of the groups.
POPULATION

The population database
24 Chosen inhabitants
The county
Digital literacy
It’s skewed
It’s not skewed
Population born in the county
All senior residents in the county
Senior population born in the county
Age
Be a resident of the county and belong to the database
Several, including number of digital equipment that has access.
SAMPLE

The population database
24 Chosen inhabitants
The county
Digital literacy
It’s skewed
It’s not skewed
Population born in the county
All senior residents in the county
Senior population born in the county
Age
Be a resident of the county and belong to the database
Several, including number of digital equipment that has access.
VARIABLE COLLECTED

The population database
24 Chosen inhabitants
The county
Digital literacy
It’s skewed
It’s not skewed
Population born in the county
All senior residents in the county
Senior population born in the county
Age

Be a resident of the county and belong to the database
Several, including number of digital equipment that has access.
SAMPLE Bias

The population database
24 Chosen inhabitants
The county
Digital literacy
It’s skewed
It’s not skewed
Population born in the county
All senior residents in the county
Senior population born in the county
Age
Be a resident of the county and belong to the database
Several, including number of digital equipment that has access.
2) 200 students from one school were interviewed, among others, about their parish of
residence (choose between Arouga, Feija, Mareca and Another), Number of siblings,
Distance from residence to school, Gender, Body Temperature and Use of Mathematics
(with values Insufficient, Sufficient, Good, Very good) .
You should just put the correct answer, without justifying it in the response space. Numerical
responses must be accurate to at least 3 decimal places.
a) Rate the variable Distance from residence to school:

Qualitative
Qualitative ordinal
Nominal qualitative
Qualitative continuous
Discrete qualitative
Quantitative
Quantitative ordinal
Nominal quantitative
Quantitative continuous
Discrete quantitative
Quantitative continuous on a ratio scale
Discrete quantitative on ratio scale
Quantitative continuous in scale of intervals
discrete quantitative at interval scale
b) Rate the body temperature variable:

Qualitative
Qualitative ordinal
Nominal qualitative
Qualitative continuous
Discrete qualitative
Quantitative
Quantitative ordinal
Nominal quantitative
Quantitative continuous
Discrete quantitative
Quantitative continuous on a ratio scale
Discrete quantitative on ratio scale
Quantitative continuous in scale of intervals
discrete quantitative at interval scale
c) Consider from this point the variable Parish of residence (choose between Arouga,
Feija, Mareca and Other). Based on the values given in the following frequency table,
complete it (Place NA in the response spaces, if not applicable):
Value
Arouga
Bean
Mareca
other
Freq. Absolute
Simple
57
Freq. Absolute
Accumulated
Freq. Relative
Simple
Freq. Relative
Cumulative
0.21
41
d) Complete the following sentence: In absolute number, the respondents that are from
the parish Arouga.
e) e) Which of the following charts best represents the variable considered?
3) In a club, the number of hours of training in the gym of a group of 51 athletes of different
modalities was collected, (excel file). You should just put the correct answer. Numerical
responses must be accurate to at least 3 decimal places.
a) Complete the frequency table (place NA, if not applicable):
Value
Freq. Absolute
Simple
Freq. Absolute
Accumulated
Freq. Relative
Simple
Freq. Relative
Cumulative
1
2
3
4
5
6
7
8
9
b) Complete the following sentence: In absolute number, respondents train a maximum of 4
hours in the gym.
c) Complete the following sentence: In percentage, % of athletes train exactly 8 hours in the
gym.
d) Which of the following graphs best illustrates the absolute values of the simple frequencies
of the different values?

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