Statistical measures

The mean of the numbers -2, -1, 0, 1, 3

• 0

• 1

• 0.2

• doesn't exist

• neither of above

The median of the sample 2, 10, 11, 11, 21, 1000 is?

• (11+21)/2 = 16

• 11

• (10+11)/2

• doesn't exist

• neither of above

The mode of the sample point -5, -1, 7, 2, -1, 3, 7, -3, 3, -3, 5, -7, -7, -1, 9 is?

• -1

• 3

• 7

• does n't have mode

• it has more than one mode

What is the total number of data n?

• 8

• 64

• 90

• don't know

• neither of above

What is the mean?

• -2.07

• 0

• 1.1666

• 11.25

• neither of above

What is the median?

• -2.7727

• 4.5

• -0.25

• -3.35

• ninguna de las anteriores

What is the Mode?

• 5

• 40

• -3

• -4

• doesn't have mode

Quartile 3 is between what values?

• -1 and 0

• -4 and -3

• -2 and -1

• -3 and -2

• neither of above

Find the decile 9

• 1

• 1.25

• 1.5

• 1.75

• 2

Choose all correct sentences.

• Data is symetric so you shoud use the mean and the standar deviation

• Data is skewed to the right so you shoud use the median and the interquartile interval

• Data is skewed to the left so you shoud use the median and the interquartile interval

• Mode < Mediana < Media

• the 80% of data is between -3.375 y 1.25