Exercise 1

Classify the following variables

  1. Daily hours of exercise.
  2. Nationality.
  3. Blood pressure.
  4. Severity of illness.
  5. Number of sport injuries in a year.
  6. Daily calorie intake.
  7. Size of clothing.
  8. Subjects passed in a course.

Exercise 2

The number of injuries suffered by the members of a soccer team in a league were

0 1 2 1 3 0 1 0 1 2 0 1 1 1 2 0 1 3 2 1 2 1 0 1

Compute:

  1. Construct the frequency distribution table of the sample.
  2. Draw the bar chart of the sample and the polygon.
  3. Draw the cumulative frequency bar chart and polygon.

Exercise 3

A survey about the daily number of medicines consumed by people over 70 shows the following results:

3 1 2 2 0 1 4 2 3 5 1 3 2 3 1 4 2 4 3 2 3 5 0 1 2 0 2 3 0 1 1 5 3 4 2 3 0 1 2 3
  1. Construct the frequency distribution table of the sample.
  2. Draw the bar chart of the sample and the polygon.
  3. Draw the cumulative relative frequency bar chart and polygon.

Exercise 4

In a survey about the dependency of older people, 23 persons over 75 years were asked about the help they need in daily life. The answers were

B D A B C C B C D E A B C E A B C D B B A A B

where the meanings of letters are:

A No help. B Help climbing stairs. C Help climbing stairs and getting up from a chair or bed. D Help climbing stairs, getting up and dressing. E Help for almost everything.

Construct the frequency distribution table and a suitable chart.

Exercise 5

The number of people treated in the emergency service of a hospital every day of November was

15 23 12 10 28 7 12 17 20 21 18 13 11 12 26 30 6 16 19 22 14 17 21 28 9 16 13 11 16 20
  1. Construct the frequency distribution table of the sample.
  2. Draw a suitable chart for the frequency distribution.
  3. Draw a suitable chart for the cumulative frequency distribution.

Exercise 6

The following frequency distribution table represents the distribution of time (in min) required by people attended in a medical dispensary.

  1. Complete the table.
  2. Draw the ogive.

Exercise 7

The following table represents the frequency distribution of the yearly uses of a health insurance in a sample of clients of a insurance company.

uses clients
0 4
1 8
2 6
3 3
4 2
5 1
7 1

Draw the box plot. Study the symmetry of the distribution.

Exercise 8

The box plots below correspond to the age of a sample of people by marital status.

plot of chunk ages_marital_status_boxplot

  1. Which group has higher ages?
  2. Which group has lower central dispersion?
  3. Which groups have outliers?
  4. At which group is the age distribution more asymmetric?