the graph below represents the result of a survey in which a number of students reported how many letters…

the graph below represents the result of a survey in which a number of students reported how many letters were in their last names. name length what was the mean name length?

the graph below represents the result of a survey in which a number of students reported how many letters were in their last names. name length what was the mean name length?

Answer

Explanation:

Step1: Identificar los valores de x (longitud del nombre) y f (frecuencia)

Supongamos que las longitudes de nombre (x) son 2, 3, 4, 5, 8, 9 y las frecuencias (f) correspondientes son 2, 4, 1, 1, 3, 1 respectivamente.

Step2: Calcular fx (producto de x y f)

Para x = 2 y f = 2, fx = 2×2 = 4; para x = 3 y f = 4, fx = 3×4 = 12; para x = 4 y f = 1, fx = 4×1 = 4; para x = 5 y f = 1, fx = 5×1 = 5; para x = 8 y f = 3, fx = 8×3 = 24; para x = 9 y f = 1, fx = 9×1 = 9.

Step3: Sumar los valores de fx

$\sum fx=4 + 12+4 + 5+24 + 9=58$.

Step4: Sumar las frecuencias

$\sum f=2 + 4+1 + 1+3 + 1=12$.

Step5: Calcular la media

La media $\bar{x}=\frac{\sum fx}{\sum f}=\frac{58}{12}\approx4.83$.

Answer:

4.83