DOC

Calculator displays

By Sandra Cooper,2014-04-13 21:10
13 views 0
Calculator displays

    Median B4 The table below shows the number of taxis per week between

     two towns over 13 weeks. Find the median number of taxis.

    A: What is the Median ? Number of taxis 11 12 13 14

    Number of weeks 2 4 6 1

B5 A biologist is comparing the length of the stalks of a sample

     of 20 mushrooms.

     The table below shows his results.

     Find the median stalk length.

    Stalk Length (mm) 18 19 20 21 22 23

    Number of Mushrooms 1 1 3 5 7 3 The median person B6 The table below shows the scores in a mathematics test.

    Seven workers stand in a line. Score 0 1 2 3 4 5 6 7

    They are arranged so that everyone is in order of height. Number of Students 2 3 6 5 3 4 8 4

    The tallest person should be at the front and the shortest at the back. Find the median score.

     Who is in the middle ?

    B7 The table below shows the ages of all of the people in a certain That person has the average height for that group. mathematics class.

    We say that they have the median height. Age 11 12 14 17 42 Number of people 9 16 3 1 1 Example

     Find the median age. The weights of 7 shopping bags are listed below. Find the median weight. 1; 2kg, 0;8kg, 1;05kg, 1;4kg, 0;95kg, 1;15kg, 0;75kg. Solution

    First we write the weights in order.

    0;75kg, 0;8kg, 0;95kg, 1;05kg, 1;15kg, 1;2kg, 1;4kg

     Next, we choose the middle one. 0;75kg, 0;8kg, 0;95kg, 1;05kg, 1;15kg, 1;2kg, 1;4kg

     The median weight is 1;05kg. ? Deptford Green School 1998

    B Harder Median Examples

    Example

A1 Measure the lengths of the pencils in the picture below.

     Which pencil has the median length ?

    (a)(b)(c)(d)(e)(f)(g)

    A2 (a) Write these numbers in order:

     6, 9, 2, 11, 3, 8, 1, 4

     (b) Which number is the median ?

    A3 (a) Write these numbers in order:

     23, 13, 38, 56, 42, 21, 52, 71, 19

     (b) Which number is the median ?

    A4 (a) Write these numbers in order:

     0;3, 1;3, 0;7, 2;1, 1;7, 5;4, 1;8

     (b) Which number is the median ?

A5 Copy and complete:

     To find the median of a list of numbers first you ……..

     Then you choose the ……….

Report this document

For any questions or suggestions please email
cust-service@docsford.com