QUESTION IMAGE
Question
to determine a students overall test score for the semester, ms. ackerman deletes the lowest test and earned the following test scores in ms. ackermans class this semester: 62, 78, 83, 86, and 93
a. 77.5
b. 80.4
c. 83.0
d. 85.0
e. 85.5
Step1: Eliminar la puntuación más baja
Las puntuaciones son \(62\), \(78\), \(83\), \(86\), \(93\). La puntuación más baja es \(62\). Las puntuaciones restantes son \(78\), \(83\), \(86\), \(93\).
Step2: Calcular la media
La fórmula para la media es \(\frac{\sum_{i = 1}^{n}x_{i}}{n}\). Aquí, \(n = 4\), \(x_{1}=78\), \(x_{2}=83\), \(x_{3}=86\), \(x_{4}=93\). Entonces \(\sum_{i = 1}^{4}x_{i}=78 + 83+86 + 93=340\). La media es \(\frac{340}{4}=85\).
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D. \(85.0\)