a soccer coach recorded how many hours, rounded to the nearest hour, each of 12 soccer players practiced for…

a soccer coach recorded how many hours, rounded to the nearest hour, each of 12 soccer players practiced for last week. the first quartile of the data was 7.5. which statement must be true? exactly 9 of the 12 soccer players practiced for at least 7.5 hours last week exactly 3 of the 12 soccer players practiced for between 7 and 8 hours last week exactly 9 of the 12 soccer players practiced for between 7 and 8 hours last week exactly 3 of the 12 soccer players practiced for at least 7.5 hours last week

a soccer coach recorded how many hours, rounded to the nearest hour, each of 12 soccer players practiced for last week. the first quartile of the data was 7.5. which statement must be true? exactly 9 of the 12 soccer players practiced for at least 7.5 hours last week exactly 3 of the 12 soccer players practiced for between 7 and 8 hours last week exactly 9 of the 12 soccer players practiced for between 7 and 8 hours last week exactly 3 of the 12 soccer players practiced for at least 7.5 hours last week

Answer

Explanation:

Step1: Comprender el primer cuartil

El primer cuartil (Q1) divide los datos en dos partes: el 25% de los datos más bajos y el 75% de los datos más altos.

Step2: Calcular el 25% de 12

$12\times0.25 = 3$. Esto significa que el 25% de los 12 jugadores (es decir, 3 jugadores) tienen valores menores o iguales a Q1. Entonces, el 75% de los jugadores (es decir, $12 - 3=9$ jugadores) tienen valores mayores o iguales a Q1.

Answer:

Exactamente 9 de los 12 jugadores de fútbol practicaron por lo menos 7.5 horas la semana pasada.