1. THE SPORT MOST DESPIRED BY ROSARINAS STUDENTS

In the last 4 years the institution had many volleyball teams and by categories, to perform a study on, which teams had the least dispersion and measures of central tendency significant? That is why we will call you team blue and red, the technician recorded the heights of the players in the following table.

Stature (cm). Blue . Red

[165 ; 170 > . 3 . 3

[170 ; 175 > . 3 . 2

[175 ; 180 > . 1 . 2

[180 ; 185 > . 1 . 2

[ 185 ; 190 > . 1 . 1

[ 190 ; 195 ] . 3 . 2

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Total . 12 . 12

With this information he responds:

a) Calculate the arithmetic mean of each team?

b) What will be the variance, the standard deviation of each team?

c) How much do the means of the heights differ and which team has less dispersion or is it more even?