Respuesta :

the mean = (sum of the data ) / (number of data)

sum of the data = 86+91+94+86+88+86+74+66+74+73+68 = 886

number of data = 11

Hence,

mean = 886 / 11 = 80.5

b) To get the median, first we arrange the numbers in ascending order

66, 68, 73, 74, 74, 86, 86, 86, 88, 91, 94

The number of data is 11

Therefore the median is the 11 / 2 = 5.5th data

Counting from the left of the rearranged data set, we get 86

Hence, median = 86

c) mode is the number with the highest frequency.

From the rearranged data set, we get mode to be 86

mode = 86

d) Range = the highest - the lowest

the highest = 94,

the lowest = 66

Therefore

range = 28

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