Analysing data - Edexcel test questions - Edexcel

1

7 numbers are listed as: 5, 3, 2, 10, 19, 7 and 3. What is the mode?

No mode

2

7 numbers are listed as: 5, 3, 2, 10, 19, 7 and 3. What is the median?

No median

3

7 numbers are listed as: 5, 3, 2, 10, 19, 7 and 3. What is the mean?

4

7 numbers are listed as: 5, 3, 2, 10, 19, 7 and 3. What is the range?

-2

5

7 numbers are listed as: 5, 3, 2, 10, 19, 7 and 3. Find the interquartile range.

6

What is one advantage of using the mode?

Can be used if the data is not numerical, for example, gives an average of eye colours in a class

Easy to work out

Takes account of anomalous data

7

What is one disadvantage of using the mean?

Sometimes produces an incorrect value

Difficult to calculate

Skewed by extreme values

8

The table below shows the number of patients waiting for an appointment in a dentist's surgery over a 10 hour period. What was the mean number of patients waiting?

Number of patients	Frequency
0	1
1	3
2	2
3	4

3 patients

1.9 patients

2 patients

9

The table below shows the height in centimetres of a local rugby team. Find the modal height.

Height in cm (h)	Frequency (f)
170 \[\textless\] h ≤ 175	2
175 \[\textless\] h ≤ 180	2
180 \[\textless\] h ≤ 185	5
185 \[\textless\] h ≤ 190	3
190 \[\textless\] h ≤ 195	2
195 \[\textless\] h ≤ 200	1

180 \(\textless\) h ≤ 185

170 \(\textless\) h ≤ 175, 175 \(\textless\) h ≤ 180 and 190 \(\textless\) h ≤ 195

10

The table below shows the height in centimetres of a local rugby team. Find the group that contains the median height.

Height in cm (h)	Frequency (f)
170 \[\textless\] h ≤ 175	2
175 \[\textless\] h ≤ 180	2
180 \[\textless\] h ≤ 185	5
185 \[\textless\] h ≤ 190	3
190 \[\textless\] h ≤ 195	2
195 \[\textless\] h ≤ 200	1

180 \(\textless\) h ≤ 185

180 \(\textless\) h ≤ 185 and 185 \(\textless\) h ≤ 190

182.5 cm