a residential community was polling households to find out whether they wanted to get their tv signal from a…
a residential community was polling households to find out whether they wanted to get their tv signal from a satellite or cable. the results are shown in the venn diagram. what are the values of a and b in the relative frequency table for the survey results? round answers to the nearest percent. tv signal satellite cable 55 12 75 4
Answer
Answer:
a = 38%, b = 3%
Explanation:
Step1: Calcular el total de encuestados
Sumamos todos los valores en el diagrama de Venn: $55 + 12+75 + 4=146$.
Step2: Calcular el valor de a
La cantidad de personas que prefieren solo satélite es 55. La frecuencia relativa $a$ se calcula como $\frac{55}{146}\times100%\approx38%$.
Step3: Calcular el valor de b
La cantidad de personas que no prefieren satélite ni cable es 4. La frecuencia relativa $b$ se calcula como $\frac{4}{146}\times100%\approx3%$.