A Level Maths

An average...

Unlikely to be affected by extreme values.

Useful to manufacturers that need to know the most popular styles and sizes.

Can be used for all sets of qualitative data.

(a)  

What is the reciprocal of sine?

• secant

• cosecant

• tangent

• cosine

Find the range and the interquartile range of the dataset represented in the following box plot.

• Range = 2.3; IQR = 1.75

• Range = 3.3; IQR = 1.65

• Range = 3.3; IQR = 1.75

• Range = 4.3; IQR = 1.75

The most commonly known average. The sum of a set of data values can be found from this.

• median

• IQR

• mean

• mode

The following stem-and-leaf diagram shows the marks out of 50 obtained by 15 students in a Science test.

Find the range and interquartile range of the marks.

• 41 and 17

• 41 and 18

• 43 and 18

• 40 and 18

Rishi and Daisy take the same seven tests in Mathematics, and both students’ marks improve on successive tests. Their percentage marks are as follows.

Rishi’s marks: 15 24 28 33 39 42 50

Daisy’s marks: 51 65 69 72 78 83 86

Name two measures that could be used together to give a meaningful comparison of the two students’ marks.

• One of mode or mean and one of range or IQR.

• One of median or mean and one of Var(x) or IQR.

• One of cumulative frequency or mean and one of range or IQR.

• One of median or mean and one of range or IQR.

• 25.23

• 23.25

• 23

• 23.26

The reciprocal of cotangent is (a)   .

• Median = 6; mode = 8

• Median = 8; mode = 6

• Median = 6; mode = 6

• Median = 5; mode = 8

Find the exact value.

• -sqrt 2

• sqrt 3

• -sqrt 3

• sqrt 2