SS2 mathematics welcome test

Ten women were asked how many of their children were at secondary school. Their replies were: 2,1,0,2,0,4,0,0,2,1. What is the mode of these numbers?

• 0

• 1

• 2

• 4

What is the standard deviation for this data: 2,1,0,2,0,4,0,0,2,1.

• 0.33

• 0.4

• 1.05

• 1.2

An athlete runs to the top of a hill and back down. Her average speed uphill is 6km/h and her average speed downhill is 12km/h. What is the her average speed for the whole journey?

• 7km/h

• 8km/h

• 9km/h

• 10km/h

The mean age of five children is 8years 4months. When Amina joins the children, their mean age becomes 8years 5months. How old is Amina?

• 8years 7months

• 8years 8months

• 8years 9months

• 8years 10months

Find the sum of the deviation from the mean of the following data: 45,55,62,73,82,72,93,98.

• -10

• -2

• 2

• 10

What is the range of even numbers between 1 and 40?

• 38

• 36

• 40

• 20

Find the median of the set of numbers 12,15,13,14,12,12.

• 13.5

• 12.5

• 12

• 13

Calculate the standard deviation of the following marks: 2,3,6,2,5,0,4,2.

• 1.5

• 1.7

• 1.8

• 1.9

The variance of a given distribution is 25. What is the standard deviation?

• 625

• 75

• 25

• 5

Find the mean deviation of these numbers: 10,12,14,15,17,19

• 2.5

• 2.6

• 2.7

• 2.8