JSS 1 Mathematics Flashcards: Representing and Interpreting Data

Question 1

Five traders sold 12, 8, 15, 10 and 9 baskets of tomatoes. What is the median number sold?

Accepted Answer

10 baskets

Question 2

A class recorded these reading times: 18, 12, 16, 14 minutes. The median time is ________.

Accepted Answer

15 minutes

Question 3

Tunde says the median of 5, 20, 8, 11, 14 is 8 because 8 is written in the middle. What correction should he make?

Accepted Answer

Order the values and choose 11

Question 4

Why must an unordered data set be arranged before its median is selected?

Accepted Answer

The median depends on the middle position

Question 5

Nine pupils line up from shortest to tallest. Whose height represents the median?

Accepted Answer

the 5th pupil’s

Question 6

A coach has 10 ordered sprint times. To calculate the median, she should average the ________.

Accepted Answer

5th and 6th times

Question 7

Compare Set P: 2, 6, 9 and Set Q: 4, 6, 20. What do the sets have in common?

Accepted Answer

Both have median 6

Question 8

The daily numbers of customers were 20, 22, 23, 25 and 80. Which figure best shows the central position without being pulled toward 80?

Accepted Answer

the median, 23

Question 9

For the ordered data 3, 6, 8, 12, 17, the central observation is ________.

Accepted Answer

8

Question 10

Every score in a data set rises by 4 marks. How will its median change?

Accepted Answer

It will rise by 4 marks

Question 11

The ordered values are 4, 7, x, 15, 18 and their median is 11. What is x?

Accepted Answer

11

Question 12

A sixth value, 100, is added to 2, 4, 6, 8, 10. What is the new median?

Accepted Answer

7

Question 13

Bisi found the median of 7, 9, 12, 13 as 10.5. Is her result correct?

Accepted Answer

Yes; she correctly averaged 9 and 12

Question 14

Bus waiting times at a Lagos stop were 4, 5, 5, 7, 9, 12, 15 minutes. A typical middle wait was ________.

Accepted Answer

7 minutes

Question 15

A data set has median 14. If every observation is doubled, its new median will be ________.

Accepted Answer

28

Question 16

Without calculating a mean, decide the median of 1, 4, 4, 4, 30.

Accepted Answer

4

Question 17

The two central values in an ordered six-item set are 24 and 32. Complete the calculation: median = ________.

Accepted Answer

28

Question 18

After ordering 13, 6, 10, 8, 9, Ada crossed out equal numbers from both ends. Which value remains?

Accepted Answer

9

Question 19

One score is missing from the ordered set 5, 8, 12, __, 20, 24. If the median is 14, what is the missing score?

Accepted Answer

16

Question 20

A survey gives the ordered household sizes 2, 3, 4, 4, 5. Which statement correctly interprets the median?

Accepted Answer

The middle household has 4 people

Strong work.