a survey of 100 students at a school finds that 15% of the students walk or bike to school. the margin of…

a survey of 100 students at a school finds that 15% of the students walk or bike to school. the margin of error is ±3.6%. select all the likely percentages of students who walk or bike to school. 7.8% 10.2% 11.5% 17.1%

a survey of 100 students at a school finds that 15% of the students walk or bike to school. the margin of error is ±3.6%. select all the likely percentages of students who walk or bike to school. 7.8% 10.2% 11.5% 17.1%

Answer

Explanation:

Step1: Encontrar el límite inferior

Restamos la margen de error al porcentaje encontrado en la encuesta. $15% - 3.6%= 11.4%$

Step2: Encontrar el límite superior

Sumamos la margen de error al porcentaje encontrado en la encuesta. $15%+3.6% = 18.6%$

Step3: Verificar opciones

Comprobamos que opciones están dentro del rango $11.4%$ - $18.6%$.

Answer:

11.5%, 17.1%