Measures of dispersion for ungrouped data (F4)

It is found that the scores obtained can be written in the form x ≤ scores marks ≤ y. Find the values of x and y

• x = 3 , y = 7

• x = 3 , y = 11

• x = 9, y = 10

• x = 10, y = 11

Find the varians

• 34.0

• 33.0

• 34.5

• 35.5

Find the difference between the interquartile range and the range of the set data above

• 8

• 12

• 5

• 17

Find the mean of the students' score marks

• 60.55

• 62.25

• 63.5

• 68.25

Sum of 15 numbers is 1200 while sum of square of the numbers is 381000.

Calculate the mean of the numbers.

• 80

• 82

• 77

• 85

Calculate the variance and the standard deviation of the set of the data

• Variance = 3.25, Standard deviation = 1.80

• Variance = 1.64, Standard deviation = 1.28

• Variance = 8.95, Standard deviation = 2.99

• Variance = 12.2, Standard deviation = 3.49

Find the interquartile range of the data

• 15

• 18

• 33

• 62

What is the range of the data

• 27

• 31

• 30

• 34

Half of the drivers drive less than x kmh^-1. What is the value for x?

• 90

• 75

• 85

• 100

Calculate the value of P

• 6

• 8

• 12

• 11