Statistic
Tablas estadísticas
Conceptos previos
Frecuencias
Tablas estadísticas
Cualitativa
Cuantitativa discreta
Cuantitativa continua
Test
Ejercicio 1
Ejercicio 2
Ejercicio 3
Ejercicio 4
The set of all elements of data whose characteristics are being studied are called:
Population
Sample
Variable
A cleaning company wants to conduct a study on the effectiveness of a new product.
To do this it tests and analyses one in every 50 cans of this product.
The set of products analysed is called the:
Population
Sample
Variable
A variable is variable if…
data can not be written down as numbers.
data can be written down as numbers.
neither of the above.
The number of lottery winners is a:
quantitative variable.
qualitative variable.
neither of the above.
The number of text messages sent by the students of a secondary school over a weekend is a:
quantitative variable.
qualitative variable.
neither of the above.
The number of times a piece of data (score) occurs in a set of information is called:
Frequency
Relative frequency
Percentage
We can calculate the cumulative frequencies when working with :
qualitative variables
quantitative variables
both of them
The class midpoint is:
The value halfway between the lower and the upper class limits.
Each of the individuals in a continuous quantitative variable.
The arithmetic mean of all the values of a quantitative variable.
The difference between the greatest number and the least number in a set of numbers is called the:
Arithmetic mean
Range
Mode
The sum of all relative frequencies:
comes to the total number of observations.
is equal to the sum of all frequencies
comes to 1