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Students took an exam. Here are their grades. What is the class' mean grade? What
is the median grade?
(Round the average to the nearest whole number.)
65, 70, 70, 80, 80, 85, 85, 85, 90, 90, 100

Respuesta :

jecinta12

Answer:

mean=81.81

median=85

Step-by-step explanation:

MEAN.

[tex] \frac{65 + 70 + 70 + 80 + 80 + 85 + 85 + 85 + 90 + 90 + 100}{11} [/tex]

[tex] = 81.81[/tex]

MEDIAN

Since it's already arranged in ascending order, the middle number is taken as the median

which is 85.

i hope this helps

Answer:

See below ↓↓

Step-by-step explanation:

Mean

  • Sum of grades / No. of grades
  • 65 + 70 + 70 + 80 + 80 + 85 + 85 + 85 + 90 + 90 + 100 / 10
  • 150 + 140 + 170 + 170 + 190 + 80 / 10
  • 500 + 320 + 80/ 11
  • 900/11
  • 81.81

Median

  • The middle number is the median as the set has an odd number of data
  • ⇒ 85

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