Gr 10 Data Handling 3 - Maths Excellence
Gr 10 Data Handling 3 - Maths Excellence
Gr 10 Data Handling 3 - Maths Excellence
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Activity 2<br />
1. Class results for a test out of 30 are recorded in the table below.<br />
<strong>10</strong>A 16 12 16 11 14 15 22 16 17 15 26 23 16 22 16 17 24 19 16 -<br />
<strong>10</strong>B 20 19 14 <strong>10</strong> 14 9 8 13 14 30 27 23 24 28 17 29 20 16 14 18<br />
<strong>10</strong>C 5 20 14 12 7 2 12 21 14 26 14 14 12 14 21 24 14 14 - -<br />
INDIVIDUAL<br />
SUMMATIVE<br />
ASSESSMENT<br />
(a) Calculate the mean for each class.<br />
(b) Calculate the mode for each class.<br />
(c) Calculate the median for each class.<br />
(d) Calculate the range for each class.<br />
(e) Calculate the lower quartile for each class.<br />
(f) Calculate the upper quartile for each class.<br />
(g) Calculate the interquartile range for each class.<br />
(h) Calculate the semi-interquartile range for each class.<br />
2. Over a period of 15 days, the owner of a coffee shop recorded the number<br />
of customers who per day ordered the breakfast special. His observations<br />
were as follows:<br />
Day 1 2 3 4 5 6 7 8 9 <strong>10</strong> 11 12 13 14 15<br />
Number of orders 25 80 34 26 21 65 28 21 39 21 30 34 21 28 40<br />
Determine:<br />
(a) the mean<br />
(b) the median<br />
(c) the mode<br />
(d) the range<br />
(e) the inter-quartile range.<br />
(f) Which of the mean, median or mode is the most appropriate value in<br />
estimating how many orders will be made per day? Explain.<br />
19<br />
<strong>10</strong> LC G<strong>10</strong> MATHS LWB.indb 19 2008/09/09 12:22:46 PM
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